I use the case of pesticide drift to discuss the neoliberal shift in agrifood activism and its implications for public health and social justice. I argue that the benefits of this shift have been achieved at the cost of privileging certain bodies and spaces over others and absolving the state of its responsibility to ensure the conditions of social justice. I use this critical intervention as a means of introducing several opportunities for strengthening agrifood research and advocacy. First, (...) I call for increased critical attention to production agriculture and the regulatory arena. Second, I call for increased attention to ‘social justice’ within the food system, emphasizing the need to rekindle research on the immigrant farm labor force. (shrink)

Sylvia Wynter discusses Eurocentric thought as a closed cognitive order. In this article, Mijke van der Drift interrogates this cognitive closure as a style of thought that is intertwined with institutions. By inverting the attention Foucault gives to the subjects under scrutiny, van der Drift shows that the focus on those that maintain the institution, the managerial class, reveals how power and knowledge configure this contraction of perception. Van der Drift argues that institutions are central to this (...) process because it offers alignment of purpose and understanding by means of rights and discipline. Consequently, this alignment leads to an indifference to other ways of worlding that Philomena Essed and Isabel Hoving describe as “smug ignorance.” Van der Drift argues that this finds root in the institution, rather than being a harmful side effect that needs to be addressed. To contrast institutional alignment, the author sketches a pluralist ethics that offers an alternative mode of relationality and collective organization. (shrink)

The analysis distinguishes two types of standards for defining organic produce; process standards and product standards. Process standards define organic products by the method and means of production. Product standards define organic by the physical quality of the end product. The National Organic Program (NOP) uses process standards as the basis for defining organic. However, the situation is complicated by agricultural production practices, which sometimes result in the migration of NOP prohibited substances from conventional to organic fields. When this interaction (...) alters the value of the product or the costs of production, a production externality is said to exist. Defining organic using process, rather than product standards, influences the burden and character of production externalities. The NOP’s emphasis on process standards reduces the likelihood that production externalities will emerge. (shrink)

Eighty percent of (commercial) genetically engineered seeds (GES) are designed only to resist herbicides. Letting farmers use more chemicals, they cut labor costs. But developing nations say GES cause food shortages, unemployment, resistant weeds, and extinction of native cultivars when “volunteers” drift nearby. While GES patents are reasonable, this paper argues many patent policies are not. The paper surveys GE technology, outlines John Locke’s classic account of property rights, and argues that current patent policies must be revised to take (...) account of Lockean ethical constraints. After answering a key objection, it provides concrete suggestions for implementing its ethical conclusions. (shrink)

There are several different ways in which chance affects evolutionary change. That all of these processes are called “random genetic drift” is in part a due to common elements across these different processes, but is also a product of historical borrowing of models and language across different levels of organization in the biological hierarchy. A history of the concept of drift will reveal the variety of contexts in which drift has played an explanatory role in biology, and (...) will shed light on some of the philosophical controversy surrounding whether drift is a cause of evolutionary change. (shrink)

In order to enlarge the pool of knowledge available in the public domain, temporary exclusive rights are granted to innovators who are willing to fully disclose the information needed to reproduce their invention. After the 20-year patent protection period elapses, society should be able to make free use of the publicly available knowledge described in the patent document, which is deemed useful. Resistance to pesticides destroys however the usefulness of information listed in patent documents over time. The invention, here pesticides, (...) will have a decreased effectiveness once it enters the public domain. In some cases pesticides lose most of their efficacy shortly after temporary exclusive rights expire. Society’s share of the patent bargain—having new useful knowledge available in the public domain—is lost. Resistance can be slowed down, if pesticide use is limited by optimal compliance. Stimulating proper use is generally not compatible with existing market incentives for patent holders, since these have to be able to maximize profits in order to recoup research and development costs and satisfy obligations to the company’s stakeholders. Another incentive system is needed to ensure longevity of pesticides, which at the same time does not hamper future research. (shrink)

Several recent arguments by philosophers of biology have challenged the traditional view that evolutionary factors, such as drift and selection, are genuine causes of evolutionary outcomes. In the case of drift, advocates of the statistical theory argue that drift is merely the sampling error inherent in the other stochastic processes of evolution and thus denotes a mathematical, rather than causal, feature of populations. This debate has largely centered around one particular model of drift, the Wright–Fisher model, (...) and this has contributed to the plausibility of the statisticalists’ arguments. However, an examination of alternative, predictively inequivalent models shows that drift is a genuine cause that can be manipulated to change population outcomes. This case study illustrates the influence of methodological assumptions on ontological judgments, particularly the pernicious effect of focusing on a particular model at the expense of others and confusing its assumptions and idealizations for true claims about the phenomena being modeled. (shrink)

Brazil is the biggest market for pesticides in the world. In the registration process, a pesticide must be authorized by the Institute of the Environment, Health Surveillance Agency and Ministry of Agriculture. Evaluations follow a package of toxicological studies submitted by the companies and also based on the Brazilian law regarding pesticides. We confronted data produced by private laboratories, submitted to the Institute of the Environment for registration, with data obtained from scientific databases, corresponding to mutagenicity, carcinogenicity and teratogenicity (...) of pesticides. All studies submitted by the companies were carried out by private laboratories. From 247 pesticide formulations analyzed, none showed positive results for mutagenicity, carcinogenicity or teratogenicity. From 574 articles in the scientific literature, 84% published by public laboratories showed positive results, while 79% of those showing negative results came from private laboratories. There is an ethical concern about a conflict of interest between public/independent laboratories and private laboratories that produce data for registering pesticides. We demonstrated that there is a clear contradiction between public and private laboratories. Brazilian regulatory authorities have approved the registration of pesticides based almost exclusively on the monographs provided by the pesticide industry, because the use of scientific articles or information from the independent literature is strongly belittled by the industry. Pesticide companies argue that scientific articles cannot be trusted. Also, according to the industry, pesticide registration cannot be refused based on results from scientific articles. Thus, the registration of pesticides with mutagenic, carcinogenic and teratogenic risks has been approved in Brazil. (shrink)

Psychiatric research is in crisis because of repeated failures to discover new drugs for mental disorders. Lack of measurement validity could partly account for these failures. If researchers do not actually measure the effects of drugs on the disorders they aim to investigate, one should expect suboptimal treatment outcomes. I argue that this is the case, focusing on depression, and fear & anxiety disorders. In doing so, I show how psychiatric research illustrates a more general phenomenon that I call “validity (...) drift.” A validity drift occurs when, in the course of developing new measurement procedures, researchers end up studying something different from what they originally aimed to study. I analyze the different ways in which scientists attempt to validate procedures for measuring mental disorders for the purpose of testing drugs in animal models. I show how those validation efforts might fail, thereby leading to validity drifts. Overall, this analysis highlights the complex interplay between the development of new measurement procedures, their calibration, and scientific theories of the target phenomena. (shrink)

Drift is often characterized in statistical terms. Yet such a purely statistical characterization is ambiguous for it can accept multiple physical interpretations. Because of this ambiguity it is important to distinguish what sorts of processes can lead to this statistical phenomenon. After presenting a physical interpretation of drift originating from the most popular interpretation of fitness, namely the propensity interpretation, I propose a different one starting from an analysis of the concept of drift made by Godfrey-Smith. Further (...) on, I show how my interpretation relates to previous attempts to make sense of the notion of expected value in deterministic setups. The upshot of my analysis is a physical conception of drift that is compatible with both a deterministic and indeterministic world. (shrink)

Biologists and philosophers have been extremely pessimistic about the possibility of demonstrating random drift in nature, particularly when it comes to distinguishing random drift from natural selection. However, examination of a historical case-Maxime Lamotte's study of natural populations of the land snail, Cepaea nemoralis in the 1950s - shows that while some pessimism is warranted, it has been overstated. Indeed, by describing a unique signature for drift and showing that this signature obtained in the populations under study, (...) Lamotte was able to make a good case for a significant role for drift. It may be difficult to disentangle the causes of drift and selection acting in a population, but it is not impossible. (shrink)

"The book provides an excellent historical summary of the debates over continental drift theory in this century." —Contemporary Sociology "This is a useful discussion of the way that science works. The book will be of value to philosophers of science... " —Choice "... will find an important place in university and department libraries, and will interest afficionados of the factual and intellectual history of the earth sciences." —Terra Nova "... an excellent core analysis... " —The Times Higher Education Supplement (...) "... an ambitious and important contribution to the new sociology of science." —American Journal of Sociology "... Stewart's book is a noble effort, an interesting and readable discussion, and another higher notch on the scoreboard of critical scholarship that deserves wide examination and close attention." —Geophysics This fascinating book describes the rise and fall and rebirth of continental drift theory in this century. It uses the recent revolution in geoscientinsts' beliefs about the earth to examine questions such as, How does scientific knowledge develop and change? The book also explores how well different perspectives help us to understand revolutionary change in science. (shrink)

When the Environmental Protection Agency banned DDT late in 1972, environmentalists hailed the decision. Indeed, the DDT ban became a symbol of the power of environmental activism in America. Since the ban, several species that were decimated by the effects of DDT have significantly recovered, including bald eagles, peregrines, ospreys, and brown pelicans. Yet a careful reading of Rachel Carson’s Silent Spring reveals DDT to be but one of hundreds of chemicals in thousands of formulations. Carson called for a reduction (...) in the use of all chemical insecticides. Carson’s recommendations notwithstanding, policymakers focused on DDT and other chlorinated hydrocarbons, culminating in the DDT ban, passage of the Federal Environmental Pesticide Control Act of 1972, and subsequent bans on aldrin and dieldrin. Similarly, the history of pesticides has focused inordinately on DDT, providing a myopic image of the ongoing challenges of pesticides in agricultural practice and ongoing environmental protection efforts in the modern world. “Pesticides and the perils of synecdoche” argues that focusing on DDT oversimplified the environmental risks of chemical insecticides and narrowed the parameters of the debate, and in the process both policy and subsequent histories neglected the highly toxic organophosphate insecticides, which dominated agriculture in the United States and the world after the DDT ban, with unintended consequences for farmworkers and wildlife. (shrink)

Clatterbuck et al. (Biol Philos 28: 577–592, 2013) argue that there is no fact of the matter whether selection dominates drift or vice versa in any particular case of evolution. Their reasons are not empirically based; rather, they are purely conceptual. We show that their conceptual presuppositions are unmotivated, unnecessary and overly complex. We also show that their conclusion runs contrary to current biological practice. The solution is to recognize that evolution involves a probabilistic sampling process, and that (...) class='Hi'>drift is a deviation from probabilistic expectation. We conclude that conceptually, there are no problems with distinguishing drift from selection, and empirically—as modern science illustrates—when drift does occur, there is a quantifiable fact of the matter to be discovered. (shrink)

Recently, several philosophers have challenged the view that evolutionary theory is usefully understood by way of an analogy with Newtonian mechanics. Instead, they argue that evolutionary theory is merely a statistical theory. According to this alternate approach, natural selection and random genetic drift are not even causes, much less forces. I argue that, properly understood, the Newtonian analogy is unproblematic and illuminating. I defend the view that selection and drift are causes in part by attending to a pair (...) of important distinctions—that between process and product and that between natural selection and fitness. (shrink)

Perhaps the central question in action theory is this: what ingredient of bodily action is missing in mere behavior? But what is an analogous question for mental action? I ask this: what ingredient of active, goal-directed thought is missing in mind-wandering? My answer: attentional guidance. Attention is guided when you would feel pulled back from distractions. In contrast, mind-wandering drifts between topics unchecked. My unique starting point motivates new accounts of four central topics about mental action. First, its causal basis. (...) Mind-wandering is a case study that allows us to tease apart two causes of mental action––guidance and motivation. Second, its experiential character. Goals are rarely the objects of awareness; rather, goals are “phenomenological frames” that carve experience into felt distractions and relevant information. Third, its scope. Intentional mind-wandering is a limit case of action where one actively cultivates passivity. Fourth, my theory offers a novel response to mental action skeptics like Strawson. (shrink)

Amidst broad debates about the “New Green Revolution” in Africa, input-intensive agriculture is on the rise in some parts of Africa. This paper examines the underlying drivers of the recent and rapid adoption of herbicides and genetically modified seeds in the Burkina Faso cotton sector. Drawing on 8 months of ethnographic fieldwork in the Houndé region, this article contends that economic and cultural dynamics—often considered separately in analyses of technology adoption—have co-produced a self-reinforcing technological treadmill. On the one hand, male (...) farmers seek to increase cotton production in response to an economic squeeze. At the same time, broader cultural shifts toward individualism have created labor shortages as a result of families splitting apart, parents putting their children in school, and some women and young men refusing to provide free labor. Male cotton farmers thus increase production by turning to labor-saving inputs like herbicides, but these inputs create more debt, further locking farmers into intensive production. This article thus expands on the classic concept of the technological treadmill, demonstrating how economic and cultural processes intersect within a process of agrarian change to drive labor-saving agricultural technology adoption in the Burkinabè cotton sector. This expanded treadmill concept illuminates the complex dynamics compelling farmers’ choices to opt into input-intensive agriculture, and also helps explain rising farmer differentiation, as poorer farmers struggle to stay afloat and wealthier farmers expand. (shrink)

A hitherto neglected form of explanation is explored, especially its role in population genetics. “Statistically abstractive explanation” (SA explanation) mandates the suppression of factors probabilistically relevant to an explanandum when these factors are extraneous to the theoretical project being pursued. When these factors are suppressed, the explanandum is rendered uncertain. But this uncertainty traces to the theoretically constrained character of SA explanation, not to any real indeterminacy. Random genetic drift is an artifact of such uncertainty, and it is therefore (...) wrong to reify it as a cause of evolution or as a process in its own right. *Received July 2009. †To contact the author, please write to: Department of Philosophy, University of Toronto, 170 St. George St., Toronto, ON M5R 2M8, Canada; e‐mail: [email protected]. (shrink)

Neurodevelopmental disorders such as autism affect one-eighth of all U.S. newborns. Yet scientists, accessing the same data and using Bradford-Hill guidelines, draw different conclusions about the causes of these disorders. They disagree about the pesticide-harm hypothesis, that typical United States prenatal pesticide exposure can cause neurodevelopmental damage. This article aims to discover whether apparent scientific disagreement about this hypothesis might be partly attributable to questionable interpretations of the Bradford-Hill causal guidelines. Key scientists, who claim to employ Bradford-Hill causal (...) guidelines, yet fail to accept the pesticide-harm hypothesis, fall into errors of trimming the guidelines, requiring statistically-significant data, and ignoring semi-experimental evidence. However, the main scientists who accept the hypothesis appear to commit none of these errors. Although settling disagreement over the pesticide-harm hypothesis requires extensive analysis, this article suggests that at least some conflicts may arise because of questionable interpretations of the guidelines. (shrink)

In 1998, Greenpeace, Natuur en Milieu(Nature and Environment), Milieudefensie(Environmental Defense), and the National ConsumersUnion presented a report about the possible risks andhazards associated with pesticide residues on fruitsand vegetables. Although these organizationsexplicitly denied having unassailable evidence on theharmful effects of pesticides, they claimed that bynow there are sufficient indications that pesticidesmay indeed lead to such health hazards. They used anappeal to the so-called precautionary principle tounderpin their claims. The committee officially incharge of deciding on the admission of pesticidesaccused the (...) organizations of scaremongering. Afterdistinguishing three possible versions of theprecautionary principle, we then show that the fourorganizations used in their campaign an improperversion of the precautionary principle to convince thegeneral public. (shrink)

Genetic drift (variously called “random drift”, “random genetic drift”, or sometimes just “drift”) has been a source of ongoing controversy within the philosophy of biology and evolutionary biology communities, to the extent that even the question of what drift is has become controversial. There seems to be agreement that drift is a chance (or probabilistic or statistical) element within population genetics and within evolutionary biology more generally, and that the term “random” isn’t invoking indeterminism (...) or any technical mathematical meaning, but that’s about where agreement ends. Yet genetic drift models are a staple topic in population genetics textbooks and research, with genetic drift described as one of the main factors of evolution alongside selection, mutation, and migration. Some claim that genetic drift has played a major role in evolution (particularly molecular evolution), while others claim it to be minor. This article examines these and other controversies. -/- In order to break through the logjam of competing definitions of drift, this entry begins with a brief history of the concept, before examining various philosophical claims about the proper characterization of drift and whether it can be distinguished from natural selection; the relation of drift to debates over statisticalism; whether drift can be detected empirically and if so, how; and the proper understanding of drift as a model and as a (purported) law. (shrink)

The purpose of this paper is to elucidate the semantic relation between continental drift and plate tectonics. The numerous attempts to account for this case in either Kuhnian or Lakatosian terms have been convincingly dismissed by Rachel Laudan, who nevertheless acknowledged that there was not yet a plausible alternative to explain the so called “geological revolution”. Several decades later, the epistemological side of this revolution has received much attention, while the semantic relation between drift theory and plate tectonics (...) has remained mainly unexplored. In studying this case under a new light, the notion of embedding, as distinguished from other sorts of intertheoretical relations :11–27, 2011), will have a particular significance. After formally analyzing the relationship between continental drift and plate tectonics, it will become evident that the models of drift theory are part of the models of plate tectonics, thereby fulfilling the conditions for embedding. All theoretical concepts from drift theory are presupposed in some theoretical concepts from plate tectonics, and all empirical concepts of the former are shared by the latter. Furthermore, all the successful paradigmatic applications of continental drift are also successful applications of plate tectonics. As a consequence, under the label “geological revolution”, we actually find a salient historical case of cumulative progress across theory change. (shrink)

This article analyzes the view of evolutionary theory as a theory of forces. The analogy with Newtonian mechanics has been challenged due to the alleged mismatch between drift and the other evolutionary forces. Since genetic drift has no direction several authors tried to protect its status as a force: denying its lack of directionality, extending the notion of force and looking for a force in physics which also lacks of direction. I analyse these approaches, and although this strategy (...) finally succeeds, this discussion overlooks the crucial point on the debate between causalists and statisticalists: the causal status of evolutionary theory. (shrink)

The decision to accept or to reject an empirical hypothesis concerning the risks and hazards of a pesticide requires assessing the cost's of error if the wrong decision is taken. The assessment of such costs involves scientists in problems which are closely related to those which policy‐makers face in deciding what to do in view of the information provided by scientists. These problems include the unforeseeable effects of agricultural technologies, the assessments of costs and benefits, and the choice of (...) decision rule to use in policy formation. I conclude that the combined impact of these problems motivates the use of prudentially weighted decision rules in forming policies which regulate the use of pesticides, and it motivates the development of bio‐environmental alternatives to chemically based pest control policies. (shrink)

In this paper, I will discuss some aspects of the Swedish policy to reduce pesticide use by 50%, a decision that has attracted great interest and may sometimes have been over-advertised. It has also been followed by similar programmes in other countries such as Denmark, Holland and Canada, What are the cultural and political backgrounds? What is general and what is specifically swedish? Why did the demand for this decision first occur in Sweden, where the problems concerning pesticide (...) use are much less pronounced than in many other countries and agricultural areas? Does the Swedish policy imply a new approach with completely different conditions for pesticide use, or should it preferably be described as an adaptation to what modern pesticide and agricultural technology can achieve? (shrink)

Alexander Rosenberg (1994) claims that the omniscient viewpoint of the evolutionary process would have no need for the concept of random drift. However, his argument fails to take into account all of the processes which are considered to be instances of random drift. A consideration of these processes shows that random drift is not eliminable even given a position of omniscience. Furthermore, Rosenberg must take these processes into account in order to support his claims that evolution is (...) deterministic and that evolutionary biology is an instrumental science. (shrink)

The adequacy of Elliott Sober’s analogy between classical mechanics and evolutionary theory—according to which both theories explain via a zero-force law and a set of forces that alter the zero-force state—has been criticized from various points of view. I focus here on McShea and Brandon’s claim that drift shouldn’t be considered a force because it is not directional. I argue that there are a number of different theses that could be meant by this, and show that one of those (...) theses—the idea that drift cannot bias populations to be taken somewhere in the evolutionary space from one generation to the next—is actually false. Not only has this thesis been implicitly assumed in the discussion of the force analogy thus far, but it is also commonly found in a wider range of philosophical and biological texts. I argue that correcting this view, and the usual images associated with it, will thereby bring heuristic benefits that impact the force analogy discussion, but that also go beyond it. (shrink)

In 1883 Friedrich Nietzsche published parts I and II of Thus Spoke Zarathustra. The Prologue contains the famous—or infamous—assertion that “when Zarathustra was alone, he spoke thus to his heart: ‘Could it be possible! This old saint has not yet heard in his forest that God is dead!’”1 Fourteen years later, Bram Stoker, in Dracula, has the mate of the cargo ship, Demeter, write in its log: “we are now off in the North Sea, and only God can guide us (...) in the fog, which seems to move with us; and God seems to have deserted us.”2 Much later in the novel, Jonathan Harker expresses his anxiety over his wife, Mina, in terms of faith but also of drift: “Surely God will not permit the world to be the poorer by the loss of. (shrink)

It is well documented that the effects of legal punishment tend to drift to the family members, friends, and larger communities of convicted offenders. Instead of conceiving of punishment drift as incidental to legal punishment, or as merely foreseen but not intended by state authorities and thus permissible, I argue that efforts ought to be undertaken to limit or ameliorate it. Failure to confine punishment drift comes perilously close to punishment of the innocent and is at odds (...) with other legal doctrines and broader penal practices that hold offenders, and offenders alone, responsible for their crimes. Numerous arguments urging tolerance of punishment drift, or more assertively defending it, are examined and found wanting. (shrink)

In today’s neo-liberalist world, Islamic financial institutions face many difficulties combining contemporary financial thinking with Islamic, faith-based principles, on which their day-to-day operations ought to be based. Hence, IFI are likely to experience shifts/changes in organizational and ethical identity due to tensions that the combination of these principles invokes. We present an in-depth case study that focuses on these shifts in a major European based IFI across a 14-year period. We conceptualize identity change as drift, highlighting the multivocal nature (...) of identity construction. The ethico-faith principles that were meant to serve as living codes of ethics guiding the IFI’s organizational culture, operational processes, and strategy formation turned out to mainly have been discursively rationalized to respond to regulatory, market and institutional imperatives. The company is aware that it needs to engage in a continuous dialogue with those who set these requirements. Its ethico-faith principles may consequently be adapted quite radically, especially in periods of turmoil and takeover, as we show across the analysed time period. The paper provides valuable insights for faith-inspired organizations to reflect on the extent to which they wish to engage in the discursive justification and legitimization of current market hegemonies, whilst they actively encourage their managers to behave ethically as well. (shrink)

Climate change is considered as the global challenge in the 21st century. Anthropogenic activities have directly led to an immense increase in green house gas emissions mainly carbon dioxide that contributes mainly in the warming of atmosphere. The concentration of carbon dioxide is expected to rise twice as high as those existing in pre-industrial period, within the next century. Pesticides are the biological pollutants, which are being used by the man to kill the pests for increasing the yield of many (...) crops and insect vectors to control the spread of disease. The tremendous use of pesticides has caused severe health hazards to organisms including human beings due to climate change. Excessive use of pesticides may lead to the destruction of biodiversity. Many birds, aquatic organisms and animals are under the threat of harmful pesticides for their survival. The pesticides effects are lessen by organizing awareness program among the farmers, gave special training to them regarding consequences of pesticides, their screening and monitoring methods. (shrink)

This paper uses a 4 × 4 expansion of the Hawk–Dove Game to illustrate how sexual drift in a large genotype space can shift a population from one equilibrium in a smaller phenotype space to another. An equilibrium is only safe from being destabilized in this way when implemented by recessive alleles.

Body drift -- Contingencies: Nietzsche in drag in the theater of Judith Butler -- Complexities: the posthuman subject of Katherine Hayles -- Hybridities: Donna Haraway and bodies of paradox.

Despite the application of 2.5 million tons ofpesticides worldwide, more than 40% of all potentialfood production is lost to insect, weed, and plantpathogen pests prior to harvest. After harvest, anadditional 20% of food is lost to another group ofpests. The use of pesticides for pest control resultsin an estimated 26 million human poisonings, with220,000 fatalities, annually worldwide. In the UnitedStates, the environmental and public health costs forthe recommended use of pesticides total approximately$9 billion/yr. Thus, there is a need for alternativenon-chemical (...) pest controls, and genetic engineering(biotechnology) might help with this need. Diseaseand insect pest resistance to various pests has beenslowly bred into crops for the past 12,000 years;current techniques in biotechnology now offeropportunities to further and more rapidly improve thenon-chemical control of disease and insect pests ofcrops. However, relying on a single factor, like theBacillus thuringiensis toxin that has beeninserted into corn and a few other crops for insectcontrol, leads to various environmental problems,including insect resistance and, in some cases, athreat to beneficial biological control insects andendangered insect species. A major environmental andeconomic cost associated with genetic engineeringapplications in agriculture relates to the use ofherbicide resistant crops (HRC). In general, HRCtechnology results in increased herbicide use but noincrease in crop yields. The heavy use of herbicidesin HRC technology pollutes the environment and canlead to weed control costs for farmers that may be2-fold greater than standard weed control costs. Therefore, pest control with both pesticides andbiotechnology can be improved for effective, safe,economical pest control. (shrink)

Over half a century ago, George Zipf observed that more frequent words tend to be older. Corpus studies since then have confirmed this pattern, with more frequent words being replaced and regularized less often than less frequent words. Two main hypotheses have been proposed to explain this: that frequent words change less because selection against innovation is stronger at higher frequencies, or that they change less because stochastic drift is stronger at lower frequencies. Here, we report the first experimental (...) test of these hypotheses. Participants were tasked with learning a miniature language consisting of two nouns and two plural markers. Nouns occurred at different frequencies and were subjected to treatments that varied drift and selection. Using a model that accounts for participant heterogeneity, we measured the rate of noun regularization, the strength of selection, and the strength of drift in participant responses. Results suggest that drift alone is sufficient to generate the elevated rate of regularization we observed in low‐frequency nouns, adding to a growing body of evidence that drift may be a major driver of language change. (shrink)

The essay articulates a rhapsodic reflection on the place of images, their surfacing, and the invisible that sustains them. By way of introduction, it focuses on (1) the initial scenes of Pasolini’s Medea (1969). Following this spellbinding sequence, it addresses (2) the abiding philosophical attraction to the phenomenon of dreams and visions. This will lead to (3) the story of a momentous flight from the Eastern Mediterranean to the Western coast of Italy, sometime during the VI century BCE. One of (...) the outcomes of this event was the founding of Velia, Elea in Attic Greek. These meanderings take us to the periphery of the region “we” call “the West.” More precisely, they point to the periphery of a certain received way of thinking and may contribute to unsettle it. For what begins to emerge from this rhapsody is an unusual profile of the most celebrated pre-classical thinker: Parmenides. (shrink)

The price of sequencing all the DNA in a person's genome is falling so fast that, according to one biotech leader, soon it won't cost much more than flushing a toilet. Getting all that genomic data at an ever‐lower cost excites the imaginations not only of biotech investors and researchers but also of the President and many members of Congress. They envision the data ushering in an age of “personalized medicine,” where medical care is tailored to persons’ genomes. The new (...) name “precision medicine” should not distract us from the fact that the genomic information it depends on is more complex, uncertain, and ambiguous than anyone had hoped, nor should it distract us from an important ethical point. Unfortunately, several developments of the last fifteen years suggest that, in our excitement about the technological capacity to gather genomic data at an ever lower cost, we are drifting away from what has long been a basic ethical commitment: to offer persons a process that enables them to provide informed consent before they or anyone else accesses their genetic information. (shrink)

Perhaps the central question in action theory is this: what ingredient of bodily action is missing in mere behaviour? But what is an analogous question for mental action? I ask the following: what ingredient of active, goal-directed, thought is missing in mind-wandering? I answer that guidance is the missing ingredient that separates mind-wandering and directed thinking. I define mind-wandering as unguided attention. Roughly speaking, attention is guided when you would feel pulled back, were you distracted. In contrast, a wandering attention (...) drifts from topic to topic unchecked. From my discussion of mind-wandering, I extract general lessons about the causal basis, experiential character, and limits of mental action. Mind-wandering is a case study that allows us to tease apart two causal bases of mental action––guidance and motivation––that often track together and are thus easy to conflate. The contrast between mind-wandering and active thinking also sheds light on how goals are experienced during mental action. Goals are rarely the objects of awareness; rather, goals are “phenomenological frames” that carve experience into felt distractions (which we are guided away from) and relevant information (which we are guided towards). Finally, I account for a limit-case of mental action that psychologists call “intentional mind-wandering”. (shrink)

This article elaborates on McShea and Brandon’s idea that drift is unlike the rest of the evolutionary factors because it is constitutive rather than imposed on the evolutionary process. I show that the way they spelled out this idea renders it inadequate and is the reason why it received some objections. I propose a different way in which their point could be understood, that rests on two general distinctions. The first is a distinction between the underlying mathematical apparatus used (...) to formulate a theory and a concept proposed by that theory. With the aid of a formal reconstruction of a population genetic model, I show that drift belongs to the first category. That is, that drift is constitutive of population genetics in the same sense that multiplication is constitutive in classical mechanics, or that circle is constitutive in Ptolemaic astronomy. The second distinction is between eliminating a concept from a theory and setting its value to zero. I will show that even though drift can be set to zero just like the rest of the evolutionary factors, eliminating drift is much harder than eliminating those other factors, since it would require changing the entire mathematical apparatus of standard population genetic theory. I conclude by drawing some other implications from the proposed formal reconstruction. (shrink)

Drift is to evolution as inertia is to Newtonian mechanics. Both are the "natural" or default states of the systems to which they apply. Both are governed by zero-force laws. The zero-force law in biology is stated here for the first time.

This paper addresses the motivations behind farmers’ pesticide use in two regions of Bangladesh. The paper considers farmers’ knowledge of arthropods and their perceptions about pests and pest damage, and identifies why many farmers do not use recommended pest management practices. We propose that using the novel approach of classifying farmers according to their motivations and constraints rather than observed pesticide use can improve training approaches and increase farmers’ uptake and retention of more appropriate integrated pest management technologies.

In Everett’s many-worlds interpretation, where quantum measurements are seen as decoherence events, inexact decoherence may let large worlds mangle the memories of observers in small worlds, creating a cutoff in observable world measure. I solve a growth–drift–diffusion–absorption model of such a mangled worlds scenario, and show that it reproduces the Born probability rule closely, though not exactly. Thus, inexact decoherence may allow the Born rule to be derived in a many-worlds approach via world counting, using a finite number of (...) worlds and no new fundamental physics. (shrink)

The probability that the fitter of two alleles will increase in frequency in a population goes up as the product of N (the effective population size) and s (the selection coefficient) increases. Discovering the distribution of values for this product across different alleles in different populations is a very important biological task. However, biologists often use the product Ns to define a different concept; they say that drift “dominates” selection or that drift is “stronger than” selection when Ns (...) is much smaller than some threshold quantity (e.g., ½) and that the reverse is true when Ns is much larger than that threshold. We argue that the question of whether drift dominates selection for a single allele in a single population makes no sense. Selection and drift are causes of evolution, but there is no fact of the matter as to which cause is stronger in the evolution of any given allele. (shrink)