Drawing on recent advances in evolutionary biology, prominent scholars return to the question posed in a pathbreaking book: how evolution itself evolved.

Distributed adaptations are cases in which adaptation is dependent on the population as a whole: the adaptation is conferred by a structural or compositional aspect of the population; the adaptively relevant information cannot be reduced to information possessed by a single individual. Possible examples of human-distributed adaptations are song lines, traditions, trail systems, game drive lanes and systems of water collection and irrigation. Here we discuss the possible role of distributed adaptations in human cultural macro-evolution. Several kinds of human-distributed adaptations (...) are presented, and their evolutionary implications are highlighted. In particular, we discuss the implications of population size, density and bottlenecks on the distributed adaptations that a population may possess and how they in turn would affect the population's resilience to ecological change. We discuss the implications that distributed adaptations may have for human collective action and the possibility that they played a role in colonization of new areas and niches, in seasonal migration, and in setting constraints for minimal inter-population connectivity. (shrink)

The ‘Major Transitions in Evolution’ framework has emerged as the dominant paradigm for understanding the origins of life's hierarchical organization, but it has been criticized on the grounds that it lacks theoretical unity, that is, that the events included in the framework do not constitute a coherent category. I agree with this criticism, and I argue that the best response is to modify the framework so that the events it includes do comprise a coherent category, one whose members share (...) fundamental similarities. Specifically, I recommend defining major transitions as all those, and only those, events and processes that result in the emergence of a new population of evolutionary individuals. Two sorts of change will be required to achieve this. First, events and processes that do not meet this criterion, such as the origins of the genetic code and of human language, should be excluded. Second, events and processes that do meet the criterion, but which have generally been neglected, should be included. These changes would have the dual benefits of making MTEs a philosophically coherent category and of increasing the sample size on which we may infer trends and general principles that may apply to all MTEs. (shrink)

A number of recent biologists have used multi-level selection theory to help explain the major transitions in evolution. I argue that in doing so, they have shifted from a ‘synchronic’ to a ‘diachronic’ formulation of the levels of selection question. The implications of this shift in perspective are explored, in relation to an ambiguity in the meaning of multi-level selection. Though the ambiguity is well-known, it has never before been discussed in the context of the major transitions.

This paper takes a close look at the role of behavior in the “major transitions” in evolution—events during which inheritance and development, and therefore the process of adaptation by natural selection, are reorganized at a new level of compositional hierarchy—and at the requirements for sufficiently explaining these important events in the history of life. I argue that behavior played a crucial role in driving at least some of the major transitions. Because behavioral interactions can become stably organized in (...) novel ways on timescales faster than the lifetime of an organism, behavior can lead the way into a transition—becoming organized at the new level prior to inheritance and development. It is widely acknowledged that behavioral plasticity can play an important role in evolution; environmental novelty can elicit novel behavior that may feed back on the evolutionary process through niche selection or cultural inheritance, for example (Jablonka and Lamb 2005). I argue here that not just novel behaviors but novel forms of behavioral organization (distributed or hierarchical control that produces functional coherence) can emerge, binding the evolutionary fates of a group of organisms which were previously independent in terms of behavior as well as reproduction, and leading the way into a transition to an aggregative or “higher-level” mode of reproduction. (shrink)

This volume describes features of biological autonomy and integrates them into the recent discussion of factors in evolution. In recent years ideas about major transitions in evolution are undergoing a revolutionary change. They include questions about the origin of evolutionary innovation, their genetic and epigenetic background, the role of the phenotype, and of changes in ontogenetic pathways. In the present book, it is argued that it is likewise necessary to question the properties of these innovations and what was qualitatively (...) generated during the macroevolutionary transitions. The author states that a recurring central aspect of macroevolutionary innovations is an increase in individual organismal autonomy whereby it is emancipated from the environment with changes in its capacity for flexibility, self-regulation and self-control of behavior. The first chapters define the concept of autonomy and examine its history and its epistemological context. Later chapters demonstrate how changes in autonomy took place during the major evolutionary transitions and investigate the generation of organs and physiological systems. They synthesize material from various disciplines including zoology, comparative physiology, morphology, molecular biology, neurobiology and ethology. It is argued that the concept is also relevant for understanding the relation of the biological evolution of man to his cultural abilities. Finally the relation of autonomy to adaptation, niche construction, phenotypic plasticity and other factors and patterns in evolution is discussed. The text has a clear perspective from the context of systems biology, arguing that the generation of biological autonomy must be interpreted within an integrative systems approach. (shrink)

Both paleobiology and investigations of ‘major evolutionary transitions’ are intimately concerned with the macroevolutionary shape of life. It is surprising, then, how little studies of major transitions are informed by paleontological perspectives and. I argue that this disconnect is partially justified because paleobiological investigation is typically ‘phenomena-led’, while investigations of major transitions are ‘theory-led’. The distinction turns on evidential relevance: in the former case, evidence is relevant in virtue of its relationship to some phenomena or hypotheses concerning (...) those phenomena; in the latter, evidence is relevant in virtue of providing insights into, or tests of, an abstract body of theory. Because paleobiological data is by-and-large irrelevant to the theory which underwrites the traditional conception of major transitions, it is of limited use to that research program. I suggest that although the traditional conception of major transitions is neither ad-hoc or problematically incomplete, its promise of providing unificatory explanations of the transitions is unlikely to be kept. Further, examining paleobiological investigations of mass extinctions and organogenesis, I further argue that whether or not transitions in paleobiology count as ‘major’ turns on how we conceive of major transitions ; although major transitions potentially have a unified theoretical basis, recent developments suggest that investigations are becoming increasingly phenomena-led; adopting phenomena-led investigations maximizes the evidence available to paleobiologists. (shrink)

We extend the comparatively simple processes of group symmetry-breaking in physical systems to groupoid/equivalence class phase transitions characterizing adiabatically, piecewise stationary, information transmission in prebiotic, biological, and social phenomena: High vs. Low probability paths $$\rightarrow$$ Interior and Exterior Interact $$\rightarrow$$ Multiple Interacting Tunable Workspaces Application to nonstationary processes seems possible via generalizations of the symmetry algebra, for example, to semigroupoids. The dynamic probability models explored here can be transformed into statistical tools for the analysis of real-time and other data across (...) a spectrum of important disciplines confronted by biological and other forms of cognition and their dysfunctions. (shrink)

I argue that Grafen’s formal darwinism project could profitably incorporate a gene’s-eye view, as informed by the major transitions framework. In this, instead of the individual being assumed to maximise its inclusive fitness, genes are assumed to maximise their inclusive fitness. Maximisation of fitness at the individual level is not a straightforward concept because the major transitions framework shows that there are several kinds of biological individual. In addition, individuals have a definable fitness, exhibit individual-level adaptations and arise (...) in a major transition, only to the extent that the inclusive-fitness interests of genes within them coincide. Therefore, as others have suggested, the fundamental level at which fitness is maximised is the gene level. Previous reconciliations of the concepts of gene-level fitness and individual-level fitness implicitly recognise this point. Adaptations always maximise the fitness of their causative genes, but may be simple or complex. Simple adaptations may be controlled by single genes and be maladaptive at higher levels, whereas complex adaptations are controlled by multiple genes and rely on those genes having coinciding fitness interests at a higher level, for a given trait. (shrink)

In this dissertation, I explore the reach of the Evolutionary Contingency Thesis—a view that emphasizes the role of dependency relations and chance in evolution. Contingency produces diverse biological entities, processes, and mechanisms. I analyze the implications of evolution’s contingency in three areas. First, I address the problem of evolutionary individuality, which concerns the nature of entities that selection acts on. If we accept Lewontin’s 1970 view that individuals are selected, then what exactly are these individuals? I argue that evolutionary contingency (...) and its diversity of outcomes causes a plurality of individuality types. These types of individuals emerge, evolve, and disappear through evolution. Second, I defend a disunified model of major transitions in evolution. Major transitions mark pivotal turning points in life’s history, such as the transition from unicellularity to multicellularity. Philosophers and biologists aim to unify evolution’s transitions by establishing a property all major events share. I argue that evolutionary contingency’s emphasis on diversity supports a disunified model of transitions. That is, we should expect numerous kinds of major transitions given the diverse sets of outcomes caused by evolutionary contingency. Finally, I extend the contingency analysis to a topic in philosophy of medicine: The nature of cancer. It is common to view cancer as a by-product of our evolution as multicelled creatures. However, Lean and Plutynski argue that cancer is also a direct product of evolution by selection. In both cases, cancer is characterized in terms of how it functions as an object of selection. I argue that the diversity among cancers suggests philosophers should shift their focus to cancers’ structural differences rather than only their functional similarities. (shrink)

ABSTRACTThis article argues that Anglophone works on Chinese democracy have tended to build their analyses on assumptions that tradition is either a premodern phenomenon unrelated to China’s democratization process, a hindrance that should be gotten rid of if China is to democratize, a static phenomenon that cannot but appear antiquated with regard to a dynamic, fast-paced modern China, or an object from which modern agents can freely draw. In order to challenge these assumptions, this article suggests that modernity and democracy (...) were translated into a Chinese milieu already ripe with Gadamerian prejudices: prejudices that not only modified the meaning of modernity and democracy, but also provided the very conditions without which modernity and democracy would not have been meaningful or understood at all. Max Ko-wu Huang’s work can contribute to our understanding of the role played by various traditions in the process of translating democracy during the transitional period of modern Chin... (shrink)

The model of major transitions in evolution devised by Maynard Smith and Szathmáry has exerted tremendous influence over evolutionary theorists. Although MTE has been criticized for inconsistently combining different types of event, its ongoing appeal lies in depicting hierarchical increases in complexity by means of evolutionary transitions in individuality. In this paper, we consider the implications of major evolutionary events overlooked by MTE and its ETI-oriented successors, specifically the biological oxygenation of Earth, and the acquisitions of mitochondria and (...) plastids. By reflecting on these missed events, we reveal a central philosophical disagreement over the explanatory goals of major transitions theory that has yet to be made explicit in the literature. We go on to argue that this philosophical disagreement is only reinforced by Szathmáry’s recent revisions of MTE in the form of MTE 2.0. This finding motivates us to propose an alternative explanatory strategy: specifically, an interactionist metabolic perspective on major transitions. A metabolic framework not only avoids many of the criticisms that beset classic and revised MTE models, but also accommodates missing events and provides crucial explanatory components for standard major transitions. Although we do not provide a full-blown alternative theory and do not claim to achieve unity, we explain why foregrounding metabolism is crucial for any attempt to capture the major turning points in evolution, and why it does not lead to unmanageable pluralism. (shrink)

The evolutionary trajectory from non-human to human forms of social organization involves change from experiential- to relational-based systems of social interaction. Social organization derived from biologically and experientially grounded social interaction reached a hiatus with the great apes due to an expansion of individualization of behaviour. The hiatus ended with the introduction of relational-based social interaction, culminating in social organization based on cultural kinship. This evolutionary trajectory links biological origins to cultural outcomes and makes evident the centrality of distributed forms (...) of information for both the boundary and internal structure of human societies as these evolved from prior forms of social organization. (shrink)

What would a Grand Unified Theory of big-scale evolution look like? Here is one answer. It would unify the various trends that have been documented and suspected, the features of life that have been said to increase over its history—body size, fitness, intelligence, versatility, evolvability, energy intensiveness, energy rate density, and complexity-in-the-sense-of-part-types, and complexity-in-the-sense-of-hierarchy. It would show us how these putative trends are related to each other, how they are all the product of some single simple principle or some small (...) set of principles. It would identify and connect all of the variables that are expected to increase over the long haul in evolution, perhaps in a single equation, or if not yet quantifiable, perhaps in a single breath.The obvious unifying candidate is fitness. Natural selection acts to adapt organisms to local circumstances, of course, but it might also act over the long term to produce adaptation on a bigger scale, to produce or .. (shrink)

There is a worry that the ‘major transitions in evolution’ represent an arbitrary group of events. This worry is warranted, and we show why. We argue that the transition to a new level of hierarchy necessarily involves a nonselectionist chance process. Thus any unified theory of evolutionary transitions must be more like a general theory of fortuitous luck, rather than a rigid formulation of expected events. We provide a systematic account of evolutionary transitions based on a second-order regularity (...) of chance events, as stipulated by the ZFEL (Zero Force Evolutionary Law). And in doing so, we make evolutionary transitions explainable and predictable, and so not entirely contingent after all. (shrink)

If we are not to conclude that most planets like Earth have evolved life as intelligent as we are, we must presume Earth is not random. This selection effect, however, also implies that the origin of life need not be as easy as the early appearance of life on Earth suggests. If a series of major evolutionary transitions were required to produce intelligent life, selection implies that a subset of these were “critical steps,” with durations that are similarly distributed. (...) The time remaining from now until simple life is no longer possible on Earth must also be similarly distributed. I show how these results provide timing tests to constrain models of critical evolutionary transitions. (shrink)

The counterfactual tradition to defining actual causation has come a long way since Lewis started it off. However there are still important open problems that need to be solved. One of them is the (in)transitivity of causation. Endorsing transitivity was a major source of trouble for the approach taken by Lewis, which is why currently most approaches reject it. But transitivity has never lost its appeal, and there is a large literature devoted to understanding why this is so. Starting (...) from a survey of this work, we will develop a formal analysis of transitivity and the problems it poses for causation. This analysis provides us with a sufficient condition for causation to be transitive, a sufficient condition for dependence to be necessary for causation, and several characterisations of the transitivity of dependence. Finally, we show how this analysis leads naturally to several conditions a definition of causation should satisfy, and use those to suggest a new definition of causation. (shrink)

This is a lovely and very useful book. It deals with the emergence of higher and higher level units of evolution, especially regarding what Queller (1997) called “fraternal major transitions.” These are evolutionary transitions where the lower-level units that gang up are genetically alike and, therefore, the initial advantage is likely to come from the economy of scale rather than the complementation of function, as in the case of “egalitarian transitions.” Simple division of labor may arise from simple conditions (...) (such as some cells being inside, others outside, so that even with the same physiological reactivity the responses of the two cell types may differ), but the spectacular forms arise from evolved epigenetic mechanisms (Jablonka and Lamb 2005). (shrink)

Social evolution theory conventionally takes an externalist explanatory stance, treating observed cooperation as explanandum and the positive assortment of cooperative behaviour as explanans. We ask how the circumstances bringing about this positive assortment arose in the first place. Rather than merely push the explanatory problem back a step, we move from an externalist to an interactionist explanatory stance, in the spirit of Lewontin and the Niche Construction theorists. We develop a theory of ‘social niche construction’ in which we consider biological (...) entities to be both the subject and object of their own social evolution. Some important cases of the evolution of cooperation have the side-effect of causing changes in the hierarchical level at which the evolutionary process acts. This is because the traits that act to align the fitness interests of particles in a collective can also act to diminish the extent to which those particles are bearers of heritable fitness variance, while augmenting the extent to which collectives of such particles are bearers of heritable fitness variance. In this way, we can explain upward transitions in the hierarchical level at which the Darwinian machine operates in terms of particle-level selection, even though the outcome of the process is a collective-level selection regime. Our theory avoids the logical and metaphysical paradoxes faced by other attempts to explain evolutionary transitions. (shrink)

Logicians interested in naive theories of truth or set have proposed logical frameworks in which classical operational rules are retained but structural rules are restricted. One increasingly popular way to do this is by restricting transitivity of entailment. This paper discusses a series of logics in this tradition, in which the transitivity restrictions are effected by a determinacy constraint on assumptions occurring in both the major and minor premises of certain rules. Semantics and proof theory for 3-valued, continuum-valued and (...) surreal-valued semantics are given and the proof theory for the systems outlined. The framework is robust in the sense that no conditional, defined or primitive, which sustains the contraction principles underlying Curry paradoxes can be expressed. Classical recapture is smoothly achievable in the system which however is expressively limited and not semantically closed. The conclusion considers the issue of how to extend the system to capture full naive set theory. (shrink)

Adaptations can occur at different hierarchical levels (e.g., cells and multicellular organisms), but it can be difficult to identify the level(s) of adaptation in specific cases. A major problem is that selection at a lower level can filter up, creating the illusion of selection at a higher level. We use optimality modeling of the volvocine algae to explore the emergence of genuine group (i.e., colony-level) adaptations. We find that it is helpful to develop an explicit model for what group (...) fitness would be in the absence of group-level relationships between traits and group fitness. We call this “counterfactual fitness,” because in many actual cases of interest there are group-level relationships. Once counterfactual fitness is modeled, the difference between effects that filter up and genuine group selection is explicit and so, therefore, is the distinction between apparent and genuine group adaptations. We call the latter group-specific adaptations. Recognizing group-specific adaptations is important because only group-specific adaptations would cause the lower-level units (cells in this case) to be maladapted if they were to leave the group and enter a global cell-level population. Thus, as group-specific adaptations evolve, they create selective pressure for increased cohesiveness and individuality of groups. This article suggests that group-specific adaptations could be present in the simplest, earliest branching colonial volvocine species, which do not have distinct specialized cells. The article also makes predictions about the kind of empirical evidence needed to support or refute the hypothesis that a particular trait is a group-level adaptation. (shrink)

Why should ‘better than’ be transitive? The leading answer in ethics is that values do not change with context. But this cannot be the entire source of transitivity, I argue, since transitivity can fail even if values never change, so long as they are complex, with multiple dimensions combined non-additively. I conclude by exploring a new hypothesis: that all alleged cases of nontransitive betterness, such as Parfit’s Repugnant Conclusion, can and should be modelled as the result of complexity, not context-relativity.

: Two major philosophers of the twentieth century, the German existential phenomenologist Martin Heidegger and the seminal Japanese Kyoto School philosopher Nishida Kitarō are examined here in an attempt to discern to what extent their ideas may converge. Both are viewed as expressing, each through the lens of his own tradition, a world in transition with the rise of modernity in the West and its subsequent globalization. The popularity of Heidegger's thought among Japanese philosophers, despite its own admitted (...) limitation to the Western "history of being," is connected to Nishida's opening of a uniquely Japanese path in its confrontation with Western philosophy. The focus is primarily on their later works (the post-Kehre Heidegger and the works of Nishida that have been designated "Nishida philosophy"), in which each in his own way attempts to overcome the subject-object dichotomy inherited from the tradition of Western metaphysics by looking to a deeper structure from out of which both subjectivity and objectivity are derived and which embraces both. For Heidegger, the answer lies in being as the opening of unconcealment, from out of which beings emerge, and for Nishida, it is the place of nothingness within which beings are co-determined in their oppositions and relations. Concepts such as Nishida's "discontinuous continuity," "absolutely self-contradictory identity" (between one and many, whole and part, world and things), the mutual interdependence of individuals, and the self-determination of the world through the co-relative self-determination of individuals, and Heidegger's "simultaneity" (zugleich) and "within one another" (ineinander) (of unconcealment and concealment, presencing and absencing), and their "between" (Zwischen) and "jointure" (Fuge) are examined. Through a discussion of these ideas, the suggestion is made of a possible "transition" (Übergang) of both Western and Eastern thinking, in their mutual encounter, both in relation to each other and each in relation to its own past history, leading to both a self-discovery in the other and to a simultaneous self-reconstitution. (shrink)

All efforts undertaken so far to establish peace between Israel and the Palestinians have failed to seriously address the right of return of the Palestinian refugees. This failure stemmed from a conviction that the question of historical justice in general had to be avoided. Since justice is a subjective construct, it was argued, allowing it to become a subject of negotiation would only perpetuate the conflict. However, the experience of these peace efforts has shown that without solving the problem of (...) the Palestinian refugees an agreement cannot be reached. And the problem cannot possibly be solved without addressing the key Palestinian demand on this issue — the right of return. For both sides, the right of return, more than any other issue, touches on the essence of their history since the beginning of the conflict between them, and on their future. The national narrative of each side thus centers on its version of the history of the 1948 Arab-Israeli war, in the course of which the Palestinian refugee problem was created. And each side maintains the fundamental belief that its future national existence hinges on whether, and how, the issue of the right of return is resolved. For the Palestinians, the right of return is an inalienable right that defines their national identity and their struggle for liberation. For Israeli Jews, the right of return is perceived as an existential threat to the Jewish character of their society, if not to its very existence. It is not surprising, therefore, that within each of the two societies a national consensus has been built around this issue and that the position of each society seems to stand in complete opposition to that of the other. However, we argue that a morally and politically sound basis could and should be established for a workable solution and that such a basis can be provided by the notion of "transitional justice." Transitional justice stresses two major steps as necessary for reconciliation between parties involved in an historic conflict: recognition and restitution. Recognition entails revealing the historical truth about the injustices committed and according their victims dignity and respect as rights-bearing human beings. Restitution is meant to alleviate some of the material deprivation suffered by the victims and is also a form of recognition. In the Israeli-Palestinian case, recognition by Israel of the right of return would entail its assumption of responsibility for the uprooting of the majority of Palestinian society in 1948. This would satisfy a demand that has become a fundamental element in Palestinian national identity. Recognition would then enable the two parties to enter negotiations over restitution, in particular the implementation of the right of return. In these negotiations, as many Palestinian political leaders have indicated, the concerns of Israeli Jews with their national identity would be taken into account. Only if the fundamental concerns of the two parties, which center on the issue of the right of return, are met can the road towards reconciliation between them be opened. (shrink)

This article pays tribute to Vuyani Vellem’s work on the relevance of Black theology of liberation post-1994 in South Africa. Firstly, this article provides a synopsis of the political and economic ‘transition’ of South Africa before and after democracy. Secondly, the article seeks to provide a candid ‘reflection’ on the BLT trajectory, especially its critique of white racial theology. Thirdly, the article attempts ‘rethinking’ the location of the Bible and the black interlocutor in the post-liberation context. Fourthly, the article (...) attempts to ‘reimagining’ the relevance of BLT post-1994 with a focus on proposed contemporary theologies.Contribution: The manuscript is responding to a special issue honouring the legacy and scholarship of the late Prof Vuyani Vellem who contributed immensely to Black Theology of Liberation in the South African context. The manuscript attempt to dialogue with Vellem on key issue that he raised, especially racial issues and the role of the recognition of the black interlocutor. The VukaniBathoTsohangBatho special issue is dedicated to this great son of the soil who distinguished himself through research in the area of BTL challenging issues affecting the majority of black people, issues like racism, land, unemployment and economic inequalities in South Africa. This manuscript engages with some of these issues hence its relevance to the journal. The manuscript argues that as long as social and economic injustices exist, Black Liberation Theology will remain relevant post 1994 dispensation. (shrink)

Inclusive fitness theory was not originally designed to explain the major transitions in evolution, but there is a growing consensus that it has the resources to do so. My aim in this paper is to highlight, in a constructive spirit, the puzzles and challenges that remain. I first consider the distinctive aspects of the cooperative interactions we see within the most complex social groups in nature: multicellular organisms and eusocial insect colonies. I then focus on one aspect in particular: (...) the extreme redundancy these societies exhibit. I argue that extreme redundancy poses a distinctive explanatory puzzle for inclusive fitness theory, and I offer a potential solution which casts coercion as the key enabler. I suggest that the general moral to draw from the case is one of guarded optimism: while inclusive fitness is a powerful tool for understanding evolutionary transitions, it must be integrated within a broader framework that recognizes the distinctive problems such transitions present and the distinctive mechanisms by which these problems may be overcome. (shrink)

The end of the Cold War revitalised continental philosophy and, more particularly, interest in it from outside philosophy. "After Poststructuralism: Transitions and Transformations" analyses the main developments in continental philosophy between 1980-1995, a time of great upheaval and profound social change. The volume ranges across the birth of postmodernism, the differing traditions of France, Germany and Italy, third generation critical theory, radical democracy, postcolonial philosophy, the turn to ethics, feminist philosophies, the increasing engagement with religion, and the rise of performativity (...) and post-analytic philosophy. Analyses of the major figures are integrated within the discussion. After Poststructuralism reveals how continental philosophy - fuelled by an intense ethical and political desire to reflect changing social and political conditions - responded to the changing world and to the key issues of the time, notably globalisation, technology and ethnicity. (shrink)

The end of the Cold War revitalised continental philosophy and, more particularly, interest in it from outside philosophy. "After Poststructuralism: Transitions and Transformations" analyses the main developments in continental philosophy between 1980-1995, a time of great upheaval and profound social change. The volume ranges across the birth of postmodernism, the differing traditions of France, Germany and Italy, third generation critical theory, radical democracy, postcolonial philosophy, the turn to ethics, feminist philosophies, the increasing engagement with religion, and the rise of performativity (...) and post-analytic philosophy. Analyses of the major figures are integrated within the discussion. After Poststructuralism reveals how continental philosophy - fuelled by an intense ethical and political desire to reflect changing social and political conditions - responded to the changing world and to the key issues of the time, notably globalisation, technology and ethnicity. (shrink)

Proteins are targeted to plastids by N‐terminal transit peptides, which are recognized by protein import complexes in the organelle membranes. Historically, transit peptide properties have been defined from vascular plant sequences, but recent large‐scale genome sequencing from the many plastid‐containing lineages across the tree of life has provided a much broader representation of targeted proteins. This includes the three lineages containing primary plastids (plants and green algae, rhodophytes and glaucophytes) and also the seven major lineages that contain secondary plastids, (...) “secondhand” plastids derived through eukaryotic endosymbiosis. Despite this extensive spread of plastids throughout Eukaryota, an N‐terminal transit peptide has been maintained as an essential plastid‐targeting motif. This article provides the first global comparison of transit peptide composition and summarizes conservation of some features, the loss of an ancestral motif from the green lineages including plants, and modifications to transit peptides that have occurred in secondary and even tertiary plastids. BioEssays 29:1048–1058, 2007. © 2007 Wiley Periodicals, Inc. (shrink)

This chapter argues that the multilevel selection -1 to MLS-2 model of a major transition is incomplete because it overlooks a crucial component of fitness. It addresses that the evolution of individuality literature has failed to account for expansive fitness and that expansive fitness differences play an important role in the transition to regimes sensitive to the fitness of the corporate agent. It discusses multilevel evolution during the three phases of transitions in individuality: the aggregate phase, the (...) group phase, and the individual phase. This chapter shows that the path a lineage takes through the phases of transitions is not fixed, but determined by ecology. (shrink)

Transition education is a major challenge to be taken up. It is not simply a question of teaching a person a specific area of ​​knowledge – in this case ecological and societal questions – but rather recognizing that individuals are built by their reflections, with their feelings and according to their experiences. None of these dimensions should be left aside if we want to promote the full development of each individual. In this sense it seems important to us (...) to explain the values ​​that underlie our educational offer and the goals pursued by transition education, as well as its founding roots. This chapter thus starts by presenting the pillars for head-heart-body learning, namely a pedagogy that is relational and transformational, integrative and holistic, inter- and transdisciplinary, rooted and open. Secondly, we structure the pedagogy of the transition around six major areas of questioning, corresponding to the six gates of the FORTES approach. Eventually, drawing on the competency-based approach we present the six main transversal skills to be acquired. (shrink)

The study of culture and cultural selection from a biological perspective has been hampered by the lack of any firm theoretical basis for how the information for cultural traits is stored and transmitted. In addition, the study of any living system with a decentralized or multi-level information structure has been somewhat restricted due to the focus in genetics on the gene and the particular hereditary structure of multicellular organisms. Here a different perspective is used, one which regards living systems as (...) self-constructing energy users that utilize their genome as a library of information, making the genetic system just another component that adds fitness to the overall integrated unit. In this framework, basic fitness is measured as the ability to gather energy for growth and reproduction, and the fitness of the genetic system is broken down into two aspects: first, the effectiveness in searching for new somatic functional information, and second, the effectiveness in searching for better structures to store and process information. With this more generalized perspective, major evolutionary transitions to higher levels of organization become competitions between different information structures; furthermore the functioning and fitness of cultural systems can be more easily described and compared with other modes of information storage within biological systems. Modern technological societies are self-constructing systems that rely on written (symbolic) information storage and very complex algorithms that effectively search for variation with a high probability of successful selection. These systems are currently competing with traditional organic systems, and this competition constitutes the latest major evolutionary transition. Upon comparison of the energy-gathering potential of symbolic-based systems with DNA-based life, it appears that symbolic systems have a tremendous fitness potential and the current shift to a higher level of selection may be as significant and far-reaching as any of the previous major evolutionary transitions. (shrink)

We solve a major open problem concerning algorithmic properties of products of ‘transitive’ modal logics by showing that products and commutators of such standard logics as K4, S4, S4.1, K4.3, GL, or Grz are undecidable and do not have the finite model property. More generally, we prove that no Kripke complete extension of the commutator [K4,K4] with product frames of arbitrary finite or infinite depth (with respect to both accessibility relations) can be decidable. In particular, if.

The majority of studies of post-communism – habitually grouped under the heading of 'transitology' – understand the transition ultimately as a political and cultural convergence of the ex-communist societies with Western Europe. Even those critical approaches that regard the post-communist transition as a relatively unique phenomenon (as in the approaches of path dependency and neo-classical sociology) tend to conflate normative prescriptions with empirical descriptions and to move within an overall framework of what Michael Kennedy has aptly called ' (...) class='Hi'>transition culture'. This article argues instead that the transition's nature can only be fully grasped if a case-specific and historical-contextual approach is taken. In theoretical terms, a three-step movement to grasp diversity in Central and Eastern Europe is proposed: (1) the acknowledgement of the plurality of modernizing agency and its creativity; (2) the acknowledgement of multi-interpretability and difference as primary elements of modernity; and (3) a sensitivity to the resulting institutional variety in societal constellations. In substantive terms, it is argued that diversity is a distinctive mark of Europe that is bound to persist in an enlarged Europe, despite the spirit of assimilation in the accession process. (shrink)

This chapter combines formal models of how the fitness of a collective can become decoupled from the fitness with more empirical work on the volvocine algae. It uses the Volvox clade as a model system. It describes the evolution of altruism in the volvocine green algae. This chapter suggests that altruism may evolve from genes involved in life-history trade-offs. It shows the several cooperation, conflict, and conflict mediation cycles in the volvocine green algae. This cycle of cooperation, conflict, and conflict (...) mediation drives evolutionary transitions in individuality. (shrink)

Evolutionary Transitions in Individuality have been responsible for the major transitions in levels of selection and individuality in natural history, such as the origins of prokaryotic and eukaryotic cells, multicellular organisms, and eusocial insects. The integrated hierarchical organization of life thereby emerged as groups of individuals repeatedly evolved into new and more complex kinds of individuals. The Social Protocell Hypothesis proposes that the integrated hierarchical organization of human culture can also be understood as the outcome of an ETI—one that (...) produced a “cultural organism” from a substrate of socially learned traditions that were contained in growing and dividing social communities. The SPH predicts that a threshold degree of evolutionary individuality would have been achieved by 2.0–2.5 Mya, followed by an increasing degree of evolutionary individuality as the ETI unfolded. We here assess the SPH by applying a battery of criteria—developed to assess evolutionary individuality in biological units—to cultural units across the evolutionary history of Homo. We find an increasing agreement with these criteria, which buttresses the claim that an ETI occurred in the cultural realm. (shrink)

We solve a major open problem concerning algorithmic properties of products of ‘transitive’ modal logics by showing that products and commutators of such standard logics asK4,S4,S4.1,K4.3,GL, orGrzare undecidable and do not have the finite model property. More generally, we prove that no Kripke complete extension of the commutator [K4, K4] with product frames of arbitrary finite or infinite depth (with respect to both accessibility relations) can be decidable. In particular, ifl1andl2are classes of transitive frames such that their depth cannot (...) be bounded by any fixedn< ω, then the logic of the class {5ℑ1× ℑ2∣ ℑ1∈l1, ℑ2, ∈l2} is undecidable. (On the contrary, the product of, say,K4and the logic of all transitive Kripke frames of depth ≤n, for some fixedn< ω, is decidable.) The complexity of these undecidable logics ranges from r.e. to co-r.e. and Π11-complete. As a consequence, we give the first known examples of Kripke incomplete commutators of Kripke complete logics. (shrink)

Group-structured and neighbor-structured populations are compared, especially in relation to multilevel selection theory and evolutionary transitions. I argue that purely neighborstructured populations, which can feature the evolution of altruism, are not properly described in multilevel terms. The ability to “gestalt switch” between individualist and multilevel frameworks is then linked to the investigation of “major transitions” in evolution. Some explanatory concepts are naturally linked to one framework or the other, but a full understanding is best achieved via the use of (...) both. (shrink)