Evolutionary Biology

Change is the fundamental idea of evolution. Explaining the extraordinary biological change we see written in the history of genomes and fossil beds is the primary occupation of the evolutionary biologist. Yet it is a surprising fact that for the majority of evolutionary research, we have rarely studied how evolution typically unfolds in nature, in changing ecological environments, over space and time. While ecology played a major role in the eventual acceptance of the population genetic viewpoint of evolution in the (...) synthetic era (circa 1918-1956), it held a lesser role in the development of evolutionary theory until the 1980s, when we began to systematically study the evolutionary dynamics of natural populations in space and time. As a result, early evolutionary theory was initially constructed in an abstract vacuum that was unrepresentative of evolution in nature. The subtle synthesis between ecology with evolutionary biology (eco-evo synthesis) over the past 40 years has progressed our knowledge of natural selection dynamics as they are found in nature, thus revealing how natural selection varies in strength, direction, form, and, more surprisingly, level of biological organization. Natural selection can no longer be reduced to lower levels of biological organization (i.e., individuals, selfish genes) over shorter timescales but should be expanded to include adaptation at higher levels and over longer timescales. Long-term and/or emergent evolutionary phenomena, such as multilevel selection or evolvability, have thus become tenable concepts within an evolutionary biology that embraces ecology and spatiotemporal change. Evolutionary biology is currently suspended at an intermediate stage of scientific progress that calls for the organization of all the recent knowledge revealed by the eco-evo synthesis into a coherent and unified theoretical framework. This is where philosophers of biology can be of particular use, acting as a bridge between the subdisciplines of biology and inventing new theoretical strategies to organize and accommodate the recent knowledge. Philosophers have recommended transitioning away from outdated philosophies that were originally derived from physics within the philosophical zeitgeist of logical positivism (i.e., monism, reductionism, and monocausation) and toward a distinct philosophy of biology that can capture the natural complexity of multifaceted biological systems within diverse ecosystems—one that embraces the emerging philosophies of pluralism, emergence, and multicausality. Therefore, I see recent advances in ecology, evolutionary biology, and the philosophy of biology as laying the groundwork for another major biological synthesis, what I refer to as the Second Synthesis because, in many respects, it is analogous to the aims and outcomes of the first major biological synthesis (but is notably distinct from the inorganic and contrived progressive movement known as the extended evolutionary synthesis). With the general development of a distinctive philosophy of science, biology has rightfully emerged as an autonomous science. Thus, while the first synthesis legitimized biology, the Second Synthesis autonomized biology and afforded biology its own philosophy, allowing biology to finally realize its full scientific potential. (shrink)

This commentary aims to place Grace de Laguna’s critique of pragmatism in its historical context. It examines her 1904 response to Henry Heath Bawden, her 1909 attack on John Dewey’s immediate empiricism, and her 1910 book Dogmatism and Evolution, focusing on the following question: Why did she describe her approach as an attempt to complete the pragmatists’ Darwinian revolution in logic?

The paper aims to present a critical analysis of the phenomenon and notion of exceptionalism in bioethics. The authors demonstrate that exceptionalism pertains to phenomena that are not (yet) entirely familiar to us and could potentially bear risks regarding their regulation. After an overview of the state of the art, we briefly describe the origins and evolution of the concept, compared to exception and exclusion. In the second step, they look at the overall development debates on genetic exceptionalism, compared to (...) other bioethical debates on exceptionalism, before presenting a detailed analysis of a specific case of early regulation of genetic screening. In the last part, the authors explain the historical background behind the connection between exceptionalism and exclusion in these debates. Their main conclusion is that while the initial stage of the discussion is shaped by the concept of exceptionalism and awareness of risks of exclusion, the later development centers around exceptions that are needed in detailed regulatory procedures. (shrink)

Xuantong 玄同 (tentatively translated as dark oneness) is a unique Daoist idea that represents an ideally mental and physical state as a result of cultivation. However, owing to limited context in the Laozi, there is no consensus on the interpretation of xuantong. Contemporary studies have also neglected xuantong’s evolution in early texts and assumed a homogeneous understanding, and hence, failed to provide a nuanced account. In this article, I investigate how xuantong evolves from the Guodian Laozi to the Huainanzi and (...) Wenzi. I argue that although xuantong may originate from the Laozi, it is in the Wenzi that a coherent theory of xuantong is accomplished. This theory advocates an orderly process of cultivation that covers internal mental states, external acts, and integration with the whole universe. The cultivation would eventually lead people to adopt an undifferentiated perspective on, and reach oneness with, all things in the universe. (shrink)

The scientific papers published in a special edition of the journal “Scientia et Fides” are the result of an international scientific project titled “The Dynamic Theodicy Model: Understanding God, Evil, and Evolution.” The project leaders are Prof. Piotr Roszak (Nicolaus Copernicus University) and Prof. Saša Horvat (University of Rijeka), under the auspices of the University of Oxford and the John Templeton Foundation. Other members of the project team include Grzegorz Karwasz, Michał Oleksowicz, Tomasz Huzarek, and Jan Wółkowski.

One possible challenge for epiphenomenalism arises from the theory of evolution: if the mental has no causal powers, how might it have evolved? The aim of this paper is to argue that, contrary to some arguments advanced by other philosophers, most particularly William Robinson and Joseph Corabi, considerations from the theory of evolution do pose a genuine difficulty for epiphenomenalism.

The topic of pain and suffering is complex and requires a holistic vision. This article begins by clarifying concepts to understand pain as a biological, psychological, and social phenomenon that has an evolutionary history whose maximum expression arises in humans. Established this common ground, it explores altruism and animal cooperation as incipient phenomena of care for the other, though contextual. Then it points out that the difference with humans is that they perceive caring for the weak, innocent, and marginalized as (...) a moral duty and a path of personal flourishing. Finally, in the face of human weakness and from Christian theology, God shows with deeds a path of care for the weak by making himself weak, suffering and remaining innocent. (shrink)

Evolutionary studies have provided several explanations about how pain and suffering can be fitted into that framework, which tries to make sense of every biological and human feature in terms of evolution, survival, and fitness. These explanations point usually to how such apparently negative aspects become useful and contribute to an evolution that after all has delivered good outcomes. Such an approach might eventually render the theodicy question less sharp and critical for believers who are trying to cope with the (...) scandal of so great suffering in our world and history. Theologically we can welcome such new insights, less noticed in former tradition, but at the same time we need to be cautious before a development which could render less clear the message of Christian salvation. In any case, the new data and knowledge clearly invite to revise and reformulate the Christian salvific message, to better answer before the mystery of evil and suffering. (shrink)

It is often claimed that our knowledge of the evolutionary process adds an extra dimension to the classical problem of natural evil and makes this problem worse. Especially the principle of natural selection is often portrayed as morally inappropriate or “unfitting” for a perfectly good God to use as a means for creating biological complexity. In this article, I argue that this common view is misconceived, and that natural selection is a wholly innocuous principle. The real source of evolutionary evils (...) is the fact that resources in nature are scarce – a fact that was known long before Darwin. The problem of natural and evolutionary evil, therefore, is best construed as a question about why God permits scarcity in nature. I argue that recent research about the interrelation between competition and cooperation in the evolutionary process provides resources for answering this perennial question in a more satisfactory way than could be done before the advent of evolutionary theory. (shrink)

The theory of biological evolution has often provoked disagreement, which has frequently been divisive and counterproductive. At other times this scientific paradigm has been discussed with an apologetic intent, to explain why the science of biology and the theology of creation cannot be seen to be mutually exclusive. This paper urges Christians to move decisively to a third type of discourse. The new field of comparative genetics has provided conclusive evidence that biological evolution has given rise to the diversity of (...) living forms, including human beings. Consequently, Christians should, with confidence, gladly accept the evolutionary paradigm and look upon evolution as a divinely ordained historical process that develops through random (stochastic, free) process, but that leads to a divinely purposed consummation. As a result, biological history in its freedom but directedness to God’s final purposes should elicit wonder. People who have come to faith in the God revealed redemptively in Jesus should uninhibitedly offer adoration and praise for evolutionary fruitfulness. Worship should characterise the human response to biological history.[1] [1] In appreciation of Professor Tom McLeish FRS, scientist, teacher, theologian. (shrink)

The text presents a transhumanist point of view on evolution. It focuses on the lack of clear and obvious evolutionary solutions to the issue of involuntary suffering. It poses difficult questions about the possibility of enhencement of human nature and respecting the laws of evolution. It reflects on the positive role of pain for the development of individual people and the entire human species. It considers the thesis that perhaps evolution “needs” pain for proper human development. It asks whether the (...) transition to a higher than evolutionary stage of human development, as proposed by transhumanists, will not lead to the extinction of our species? After all, it relates all this mosaic of thoughts and theories to God, who can be the answer to many posed questions. (shrink)

It can easily look like evolution is in a better position to explain the reliability of our perceptual beliefs than the reliability of our moral beliefs. This paper takes a closer look at the issue and argues that there’s no reason—no reason which armchair philosophers could uncover—to think evolution can better explain perceptual reliability than moral reliability. It also offers a diagnosis of why it seemed otherwise. The diagnosis concerns our need to use the truth predicate as a generalizing logical (...) device in the perceptual case but not in the moral case. (shrink)

Cross-sector relationship building is an important strategy in corporate social responsibility initiatives, and communicating cross-sector relationships on social media can help raise the visibility of collaborative relationships. A noticeable gap in the literature is how social media enables and constrains the formation patterns of cross-sector connections. To understand how businesses communicate their relationships with government agencies and nonprofits about social issues on social media, we propose a theoretical framework that centers public attention as a critical resource and considers different sectors' (...) interests in the COVID-19 issue. We tested this framework with a nationally representative sample of 1,980 organizations on Twitter. The analysis reveals that the increase in public attention to the COVID-19 issue was accompanied by a greater likelihood of cross-sector ties. Specifically, firms severely affected by COVID-19 were more likely to build ties with government agencies, and the increase in public attention also drove firms to build more ties with nonprofits, especially advocacy nonprofits. Our findings suggest managers of social media communication should observe the volatile public attention and design communicative strategies accordingly. (shrink)

Natural selection is a general process that operates in different populations. To characterise natural selection as a mechanism within the framework of the new mechanistic philosophy, it is required to identify a pertinent phenomenon for which natural selection is responsible. Firstly, every case identified by evolutionary biologists as instances of natural selection must align with this mechanistic characterisation. Secondly, natural selection should genuinely be responsible for the attributed phenomenon. While philosophers often posit producing adaptation as the quintessential phenomenon, Pérez-González and (...) Luque challenge this perspective, contending that not all instances of natural selection are cases where natural selection produces adaptation. This paper further supports Pérez-González and Luque’s objection and demonstrates that natural selection is also not responsible for the increased frequency of traits with a greater expected number of offspring. Furthermore, the paper argues that even if there is a phenomenon that allows for the mechanistic characterisation of natural selection to encompass all instances, it is improbable that natural selection assumes responsibility for it. Consequently, characterising natural selection as a mechanism emerges as an implausible stance. (shrink)

At the beginning of the study of physical phenomena, the idea of "force" was widely used to explain the non-stationarity of observed phenomena, such as the movement of bodies. However, as mechanics and physical theories developed, the force notions gained own formal definitions and names, without the use of the term "force". So, the concept of kinetic energy arose instead of "vis viva", and "current" instead of "current strength" ets. Additionally, a number of new physical theories have been formulated without (...) the use of force concept. As a result, different types of forces have gradually been replaced by other more important concepts, such as energy and action, which are closely linked to fundamental physical principles. It is interesting to note that the general trend in the development of civilizations has been a shift from unrestricted power (expressed in the thesis "might makes right") to its subordination and incorporation into a legal framework. This is similar to the evolution of physics, which has seen the notion of force become eliminated or subordinated to more general principles and laws. (shrink)

Recent neuropaleontological research suggests that the parietal lobe has increased in size as much as the frontal lobes in Homo Sapiens over the past 150,000 years, but has not provided a neuropsychological explanation for the evolution of human socialization or the development of religion. Drawing from several areas of research, (i.e., neurodevelopment, neuropsychology, paleoneurology, cognitive science, archeology, and anthropology), we argue that parietal evolution in Homo sapiens integrated sensations and mental processes into a more integrated subjective “sense of self”. This (...) enhanced self advanced prosocial traits (e.g., increased empathy, greater social bonding, enhanced theory of mind capacities), promoting more effective socialization skills (e.g., parenting, group cooperation). Conversely, when this enhanced sense of self became inhibited, powerful experiences of self-transcendence occurred. We believe these potent selfless experiences became increasingly sought after though ritual means (e.g., music, dance, vision quests, spirit travel), providing the foundations for the development of shamanism and religion. (shrink)

This article investigates the agency of the architecture of the Temple of Apollo at Claros and its cognitive impact on the ritual of divination. In the comparison with Delphi, Claros represents a peculiar example of how architecture evolved to suit and shape at the same time the ritual it was hosting. The paper starts with the analysis of the exteriors of the building, highlighting the choice of the Doric style dictated by the desire of being associated to Delphi. A further (...) analysis of the internal layout gives the author a chance of describing the cognitive inputs that the peculiar structure sent to the ancient mind. Specifically, the paper studies how the narrow tunnels made of black marble that turned seven times and the underground cave like adyton created a situation of sensory confusion in the mind of the seekers and the oracle that found themselves prone to detect agencies in the surrounding space and specifically to identify the agent with Apollo. (shrink)

The article offers an analysis of the concept of the Absolute in Fichte’s philosophy. Despite the difficulty of the definition, this concept receives a rich and creative rethinking in Fichte and will further influence the philosophical systems of thought. Gradually introducing this concept into his philosophical project of Wissenschaftslehre Fichte often changes its interpretation. So, starting with a somewhat vague understanding of the concept of the "absolute I" through Schelling's criticism of the Absolute, he develops the theory of the manifestation (...) of the Absolute, each time choosing new metaphors to denote it, and sometimes filling it with religious content, when the Absolute becomes a substitute for the concept of God. On the one hand, it’s important not to reduce the Absolute to a simple object of thought because this would indicate the limitation of the Absolute. On the other hand, it would be wrong to consider the Absolute as an empty or neutral concept or something completely enclosed in itself. Then, its existence will be doubtful. Fichte is careful about a clear definition of the Absolute. He solves this dilemma through the idea of the manifestation of the Absolute. Manifestation is the exit of the Absolute beyond itself while remaining unchanged. The ability to manifest itself is a prerequisite that the Absolute can be recognized and thought. This is how the Absolute manifests itself in the form of knowledge. Fichte emphasizes that the Absolute is not a projection of our mind, it may not depend on our thinking, however with such peculiarity that truth and knowledge have their basis in it. Thereby, with the theory of the Absolute, Fichte develops the idea of the foundation that is outside of ourselves, has transcendental character, and thus allows knowledge or truth not to be trapped in subjective tenets. Analyzing step by step the process of evolution of this concept, we will be able to see how in the last years of his life, Fichte states the importance of two realities: the “I” and the “Absolute” and how he explains the connection between them. (shrink)

Reviewed by Heli Tissari Reviewed by Heli Tissari Research Unit for Variation, Contacts and Change in English Department of Modern Languages University of Helsinki, Finland [email protected]...

Scholars depict punishment as a moral dialogue between the community and the offender, which addresses both the offender’s crime and character. However, how the penal message evolves vis a vis that crime and character as it passes through the different stages of the criminal process has remained under-theorized. This article, building on communicative theory, explores the interrelation between crime and character along the penal process, from sentencing, through prison, to parole release. We argue that in the penal dialogue the relationship (...) between crime and character evolves in a dynamic way through three phases: separateness (sentencing), fusion (prison), and re-distinction (parole) of crime and character. The proposed analysis develops the communicative meaning of the penal process, provides a normative account of the work of punishment administration authorities, and explores applications of our proposed normative analysis for the administration of the punishment. (shrink)

Evolutionary debunking arguments purport to show that, if moral realism is true, all of our moral beliefs are unjustified. In this paper, I respond to two of the most enduring objections that have been raised against these arguments. The first objection claims that evolutionary debunking arguments are self-undermining, because they cannot be formulated without invoking epistemic principles, and epistemic principles are just as vulnerable to debunking as our moral beliefs. I argue that this objection suffers from several defects, the most (...) serious of which is that it has the unpalatable consequence that we should never revise our moral beliefs in response to evidence that our capacity for normative cognition is globally impaired. The second objection, which comes to us from Katia Vavova, claims that evolutionary debunking arguments are doomed to fail, because they attempt to show that our moral beliefs are unreliable without making any assumptions about the nature of morality, and this is impossible. I argue, to the contrary, that the etiological higher-order evidence cited by debunking arguments can give us good reason to think that our moral beliefs are unreliable, even if we make no assumptions about what morality is like. (shrink)

Evolutionary fitness threats and rewards are associated with subjectively unpleasant and pleasant sensations, respectively. Initially, these correlations appear explainable via adaptation by natural selection. But here I analyse the major metaphysical perspectives on consciousness – physicalism, dualism, and panpsychism – and conclude that none help to understand the adaptive-seeming correlations via adaptation. I also argue that a recently proposed explanation, the phenomenal powers view, has major problems that mean it cannot explain the adaptive-seeming correlations via adaptation either. So the mystery (...) – call it the evolutionary paradox of consciousness – remains. Some have used this mystery to argue for non-naturalistic (e.g. theistic) explanations. But I propose a naturalistic, non-adaptive explanation of the adaptive-seeming correlations: namely, ‘sensational associative learning’ during development. In this perspective, pairing of particular sensations with unconditioned stimuli – fitness rewards or threats – cause the sensations themselves to come to be interpreted as good or bad, respectively. Sensations, like colours, that are not reliably paired with either fitness rewards or threats remain largely unvalenced. Sensational associative learning also provides explanations for adaptive-seeming structural aspects of sensations, such as the observation that sounds of different pitch are experienced as ordinal in correspondence to their wavelengths while the same is not true of colours of different hue. The sensational associative learning perspective appears compatible with physicalism, panpsychism, and dualism (though not epiphenomenalism). (shrink)

The paper delves into the evolution of language in French and English, focusing on the feminization and neutralization of job titles in legal and professional settings. It explores how these linguistic changes are intertwined with the broader implications of language in shaping moral and ethical standards, advocating for gender equality, and challenging gender biases. The study highlights the slow but impactful progress in linguistic reform within legal contexts, suggesting strategies to align legal language with contemporary principles of gender equality.

theories. What was Freud thinking, when, and why and what were the major influences which shaped his ideas? We follow the inner movement of his theory construction, its meaning and coherence, as well as his conceptual logic and personal directions concerning his evolving views of the reciprocal interactions between mind and body, the motivational force of instinctual drives, and the dominant role of sexuality rooted in evolutionary biology in human development, behaviour, and the creation of neurotic disturbances. We follow Freud's (...) construction and sequential reconstructions of his theoretical models concerning the nature, dynamics, and principles of unconscious mental functioning, including his changing concepts on the nature and purpose of dreams. We trace his changing views on the role of deferred action of early childhood experiences and the determining role of unconscious fantasy, psychic reality, in the formation of adult character structure and neuroses. Through such historical analysis this book provides grounding for a meaningful understanding of Freud's familiar concepts: id, ego, superego, and the Oedipus complex. We explore what these concepts meant to Freud, why he conceived them, and what functions they served in his theory of mind. This is the perfect book for students and trainees wanting to learn more about the development of Freud's ideas, as well as for established psychoanalysts and psychotherapists interested in expanding their knowledge of Freud's theories. (shrink)

Sex, Gender, Ethics, and the Darwinian Evolution of Humanity examines the impact of Darwin's 'Descent of Man' on contemporary biology and the humanities. Its publication in 1871 was a founding event in anthropology. Its content was primarily concerned with the development of sexual life, social life, and intellectual life, not only as outcomes of evolution, but as components that have actively intermixed over time with the evolutionary mechanism of natural selection. The stamp of Darwinism on modern thought is still very (...) important and brings novelties to academic studies. Several fields influenced by Darwinian anthropology developed in recent decades, including evolutionary ethics, the evolution of sociality and sexual communication in animal and plant species. Sociobiology and evolutionary psychology are topics that draw heavily on Darwin's 'Descent of Man'. The understanding of Darwin's thought has also progressed greatly in recent decades, following the systematic study of Darwin's correspondence and notebooks, leading to a reassessment of the development of his thought on humans, social groups, and heredity, and how they come together in his theory of evolution. The book combines a historical perspective on Darwin's achievement and his legacy. It will be of interest to students and scholars in a variety of fields, from experimental biology to the social and historical sciences. (shrink)

Charles Darwin's theory of evolution continues to be controversial. Offering a ground-breaking introduction to the history and plausibility of the theory, this book shows that the theory is supportive of religion and an essential guide to approaching today's most pressing social issues - immigrants, race, homosexuality, and the status of women.

Offers both theoretical and practical insights into the dialogue between adults and children as a democratic model for schooling.

In a volume that traverses multiple disciplines, Michael Robbins proposes that the structures of the mind that distinguish us as uniquely human also incline us towards destructive behaviours on a personal and societal level. Psychoanalysis was created by Freud in an effort to understand neurosis and psychosis, the names he gave to individual human destructiveness. His understanding was limited and incorrect because the science of evolution and the disciplines of sociology and cultural anthropology were in their infancy when he formulated (...) his ideas. He did not comprehend that destructiveness is qualitatively different in humans than in other species and he ignored the problem of how biological instincts become mental processes. These limitations left psychoanalysis with one of its most perplexing unsolved problems, the mysterious leap from mind to body. The book explains how neoteny, the prolonged period of post-natal immaturity that distinguishes humans from other animals, requires and enables complex learning from caregivers. It is the knowledge acquired from this learning and its intergenerational transmission that links the biological theory of evolution with the psychosocial theory of psychoanalysis and explains how the human species is unique. The book will be of interest to those who want to learn about how integrating the findings of evolutionary science, primatology, sociology and cultural anthroplogy with the theory of psychoanalysis expands our understanding of what makes humans unique and its implications for the future of our species, and empowers us to influence the destiny of humankind. (shrink)

This book reconceptualizes the ancient philosophy of "dualism" and a "trinity" applied to classical and quantum nonequilibrium phenomena. In addition to classical mechanics and electrodynamics, a remarkable connection of this philosophy with quantum mechanics is established which can be useful for quantum computing and the development of quantum artificial intelligence. Packed with the recent theoretical models, quantum simulations of black holes, and experimental observations of quantum phase transitions, this book brings a holistic approach that can be useful to refine the (...) concept of the 'Creation', evolution of the Universe from the condensed state of matter, and explain the artificial vision. (shrink)

Although well established in developed countries, Ethics review boards in the academia, and specifically for social and behavioral sciences (SBS) research, is a relatively new, and still a controversy inducing endeavor. This study explores the establishment and functioning of ERBs in Israeli academia, serving as a case study for the challenges and progress made in ensuring ethical research practices in non-medical related spheres. A purposeful sample of 46 participants was selected, comprising ERB current or past members and SBS researchers, who (...) each interacted extensively with ERB’s evaluation processes. The participants came from all eight research universities of Israel, as well as seven large public and private academic colleges. Open, semi structured In-depth interviews were conducted in order to facilitate a critical reflective stance among the various participants, exploring their experiences, behaviors and the meanings they assign to ERB processes. Our research revealed two major themes. The first is the developmental trajectories in the construction processes of ERBs in Israel, comprised of the following stages: Initiation, expansion, opposition, and acceptance and assimilation. The second was a typology of participation throughout the ERBs’ construction process. Inspired by Merton’s strain theory, this typology includes conformists, ritualists, ideologists, control-freaks, and insurgents. The findings expose a unique perspective into the initiation, establishment, and development of ERBs, which can shed light on the role of ERBs in general, as well as point out how resistance to ERBs, as well as the different reasons for championing them, affected not only ERBs form and their legitimacy, but also their interaction with researchers. (shrink)

Decaying wood, while an abundant and stable resource, presents considerable nutritional challenges due to its structural rigidity, chemical recalcitrance, and low nitrogen content. Despite these challenges, certain insect lineages have successfully evolved saproxylophagy (consuming and deriving sustenance from decaying wood), impacting nutrient recycling in ecosystems and carbon sequestration dynamics. This study explores the uneven phylogenetic distribution of saproxylophagy across insects and delves into the evolutionary origins of this trait in disparate insect orders. Employing a comprehensive analysis of gut microbiome data, (...) from both saproxylophagous insects and their non‐saproxylophagous relatives, including new data from unexplored wood‐feeding insects, this Hypothesis paper discusses the broader phylogenetic context and potential adaptations necessary for this dietary specialization. The study proposes the “Detritivore‐First Hypothesis,” suggesting an evolutionary pathway to saproxylophagy through detritivory, and highlights the critical role of symbiotic gut microbiomes in the digestion of decaying wood. (shrink)

Comtism, with some scattered parallels.--Simple evolutionism--Spencer, Stephen.--Darwinism, or struggle for existence.--Hyper-Darwinism--Weismann, Kidd.