The heart of this book is the reciprocal relationship between philosophical theories of mind and empirical studies of animal cognition.

After introducing the new field of cultural evolution, we review a growing body of empirical evidence suggesting that culture shapes what people attend to, perceive and remember as well as how they think, feel and reason. Focusing on perception, spatial navigation, mentalizing, thinking styles, reasoning (epistemic norms) and language, we discuss not only important variation in these domains, but emphasize that most researchers (including philosophers) and research participants are psychologically peculiar within a global and historical context. This rising tide of (...) evidence recommends caution in relying on one’s intuitions or even in generalizing from reliable psychological findings to the species, Homo sapiens. Our evolutionary approach suggests that humans have evolved a suite of reliably developing cognitive abilities that adapt our minds, information-processing abilities and emotions ontogenetically to the diverse culturally-constructed worlds we confront. (shrink)

Concepts and methods originating in one discipline can distort the structure of another when they are applied to the latter. I exemplify this mostly with reference to systematic biology, especially problems which have arisen in relation to the nature of species. Thus the received views of classes, individuals (which term I suggest be replaced by units to avoid misunderstandings), and sets are all inapplicable, but each can be suitably modified. The concept of fuzzy set was developed to deal with (...) species and I defend its applicability. Taxa at all levels are real and participate in biological processes. Analysis of cause and pattern provides the deep structure in which metabiology is grounded; violation of this principle has led to diverse errors in biology. (shrink)

The name ‘pluralism’ frequently rears its head in political philosophy, but theorists often have different things in mind when using the term. Whereas ‘reasonable pluralism’ refers to the fact of moral diversity among citizens of a liberal democracy, ‘value pluralism’ is a metaethical view about the structure of moral practical reasoning. In this paper, I argue that value pluralism is part of the best explanation for reasonable pluralism. However, I also argue that embracing this explanation is compatible with political (...) liberalism’s commitment to avoiding controversial premises. According value pluralism an explanatory role does not entail according it a justificatory one. What’s more, explaining reasonable disagreement in terms of reasonable disagreement about value weights opens up space for direct appeal to substantive values within political liberalism. In particular, promoting a substantive political value when doing so does not conflict with other values is unproblematic. (shrink)

Species, or ‘the Species Problem’, is a topic in science, in the philosophy of science, and in general philosophy. There is not one, but many, species problems, and these are dealt with in this volume. Species are often thought of as units of biology, to be used in ecology, conservation, classification, and theory. The chapters in this book present opposing views on the current philosophical and conceptual issues of the Species Problem in biology. (...) -/- Divided into four sections Theories and Concepts, Practice and Methods, Ranks, Trees and Names, and Metaphysics and Epistemologies, the book is authored by systematists, philosophers, historians and working biologists, many leaders in their fields. Topics include Essentialism and individuals, speciation modes, theory and the species rank, nomenclature and diagnosis, scale of species, and ecology, conservation, and species. -/- Species Problems and Beyond aims to clarify the contemporary issues of the Species Problem. It is ideal for use in upper-level seminars and courses in Evolutionary Biology, Philosophy of Science, Philosophy of Biology, Systematics and Taxonomy, and Phylogenetics/Cladistics, and for any scholar in these fields. (shrink)

In this article, I argue that species are mutable in Hegel’s philosophy of biology. While scholars have argued for the compatibility of Hegel’s philosophy and Darwin’s theory of evolution, none have dealt with the ontological status of species in their respective accounts. In order to make the case that for Hegel species are mutable, I first deal with a textual problem that in the 1827 edition of the Encyclopedia, the species concept appears after the (...) sexual relationship, whereas in the 1830 edition it appears prior. I argue that these different sequences entail different models for the species concept. By examining the conceptual development leading up to the account of species, on the one hand, and contemporary biological accounts of the status of species on the other, I argue that the 1827 model is more consistent both with Hegel’s method and with the species concept of contemporary biology. (shrink)

A reading of a sample of taxonomical papers leads to the conclusion that new species identification is both taxonomically plausible and philosophically incoherent. As a result, taxonomy becomes a science that apparently violates a necessary condition of its rationality. It is this apparent violation that is the focus of the philosophical debate, a debate whose goal for taxonomy is theoretical coherence at a global level. In this paper, I assess the appropriateness of this goal.

There is long-standing disagreement among systematists about how to divide biodiversity into species. Over twenty different species concepts are used to group organisms, according to criteria as diverse as morphological or molecular similarity, interbreeding and genealogical relationships. This, combined with the implications of evolutionary biology, raises the worry that either there is no single kind of species, or that species are not real. This book surveys the history of thinking about species from Aristotle to modern (...) systematics in order to understand the origin of the problem, and advocates a solution based on the idea of the division of conceptual labor, whereby species concepts function in different ways - theoretically and operationally. It also considers related topics such as individuality and the metaphysics of evolution, and how scientific terms get their meaning. This important addition to the current debate will be essential for philosophers and historians of science, and for biologists. (shrink)

Although generally informed by an intimate knowledge of evolutionary biology and taxonomy, the controversy over the nature of species is clearly philosophical; it consists almost entirely of the clarification of old, and the invention of new arguments for or against calling the species category a class, The debate seems firmly divided between those, like Kitts and Bernier, who see homo sapiens as a class, and those, like Hull and Ghiselin, who see it as an individual. In the first (...) case, particular human beings are members; in the second case, parts. To the champions of class, the essentialists, each species can be defined by means of a unique set of necessary and sufficient conditions, and every organism can be placed without equivocation into a particular species. To the individualists, nothing could be further from the truth. As a contingent, product of evolution, each species shares that crucial characteristic of an individual, spacio-temporal identity; each is a chunk of genealogical nexus. (shrink)

“When Species Meet is a breathtaking meditation on the intersection between humankind and dog, philosophy and science, and macro and micro cultures.” —Cameron Woo, Publisher of Bark magazine In 2006, about 69 million U.S. households had pets, giving homes to around 73.9 million dogs, 90.5 million cats, and 16.6 million birds, and spending over $38 billion dollars on companion animals. As never before in history, our pets are truly members of the family. But the notion of “companion (...) class='Hi'>species”—knotted from human beings, animals and other organisms, landscapes, and technologies—includes much more than “companion animals.” In When Species Meet, Donna J. Haraway digs into this larger phenomenon to contemplate the interactions of humans with many kinds of critters, especially with those called domestic. At the heart of the book are her experiences in agility training with her dogs Cayenne and Roland, but Haraway’s vision here also encompasses wolves, chickens, cats, baboons, sheep, microorganisms, and whales wearing video cameras. From designer pets to lab animals to trained therapy dogs, she deftly explores philosophical, cultural, and biological aspects of animal-human encounters. In this deeply personal yet intellectually groundbreaking work, Haraway develops the idea of companion species, those who meet and break bread together but not without some indigestion. “A great deal is at stake in such meetings,” she writes, “and outcomes are not guaranteed. There is no assured happy or unhappy ending—socially, ecologically, or scientifically. There is only the chance for getting on together with some grace.” Ultimately, she finds that respect, curiosity, and knowledge spring from animal-human associations and work powerfully against ideas about human exceptionalism. One of the founders of the posthumanities, Donna J. Haraway is professor in the History of Consciousness Department at the University of California, Santa Cruz. Author of many books and widely read essays, including The Companion Species Manifesto: Dogs, People, and Significant Otherness and the now-classic essay “The Cyborg Manifesto,” she received the J. D. Bernal Prize in 2000, a lifetime achievement award from the Society for Social Studies in Science. (shrink)

Features Covers the philosophical and historical development of the concept of "species" Documents that variation was recognized by pre-Darwinian scholars Includes a section on the debates since the time of the New Synthesis Better suited to non-philosophers Summary Over time the complex idea of "species" has evolved, yet its meaning is far from resolved. This comprehensive work is a fresh look at an idea central to the field of biology by tracing its history from antiquity to today. (...) class='Hi'>Species is a benchmark exploration and clarification of a concept fundamental to the past, present, and future of the natural sciences. In this edition, a section is added on the debate over species since the time of the New Synthesis, and brings the book up to date. A section on recent philosophical debates over species has also been added. This edition is better suited non-specialists in philosophy, so that it will be of greater use for scientists wishing to understand how the notion came to be that living organisms form species. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Not Only Sub Specie Aeternitatis, but Equally Sub Specie DurationisA Defense of Hegel's Criticisms of Spinoza's PhilosophyJ. M. Fritzman and Brianne RileyIn what seem like halcyon days, when William Jefferson Clinton was America's President, James Carville wrote We're Right, They're Wrong: A Handbook for Spirited Progressives, arguing against the Republican Party's "Contract with America" (derided by the Left as a "Contract on America") and for progressivism. In the present (...) philosophical conjuncture, what is required is a precisely analogous intervention—"Hegel's Right, Spinoza's Wrong: An Article for Spirited Hegelians." Hegel criticizes Spinoza's philosophy at various places in his writings.1 Spinozists have made several major challenges to Hegel's criticisms.2 Although there have been explications of Hegel's criticisms, there has been no effective response to the Spinozists' challenges.3 Until now. This article defends Hegel's criticisms of Spinoza's philosophy and shows that the challenges to his criticisms fail.This article presents a précis of Spinoza's system and shows the senses in which Hegel is not wholly enamored with it. It defends Hegel's criticism of Spinoza's system as an acosmism from Parkinson's challenges to it. It considers both Myers's view that Hegel's system begins where Spinoza's system ends and McMinn's charge that the systems of Spinoza and Hegel are fundamentally identical. Myers and McMinn misunderstand Hegel's dialectical method, and so they incorrectly believe that the methods of Spinoza and Hegel are complementary. Hegel's dialectics can sublate the systematic pluralism that Myers and Armour propose as its alternative. The penultimate section discusses the modifications that must be made to Spinoza's system to advance from his substance to Hegel's subject.Clinton successfully appropriated what was worthwhile in the "Contract with America," but he also effectively argued that the "Contract" would be a disaster for America. Similarly, Hegel assimilates the truth in his predecessors' philosophies while demonstrating how those philosophies remain [End Page 76] one-sided and partial. This article concludes by showing how this happens to Spinoza's philosophy.Everybody Loves SpinozaSpinoza's philosophy is a metaphysical monism. That is, he thinks that there is only one basic substance. Although there is only one substance, it necessarily expresses itself through an infinite number of attributes, and an attribute is the essence of substance as experienced by the intellect.4 Humans are capable of knowing only two of these attributes: thought and extension. Objects, ideas, and relations—Spinoza refers to all of these as "modes"—are presented through some attribute or other. Spinoza denies that a thing presented through one attribute can cause or be affected by anything presented through another attribute. Rather, each thing which is presented through an attribute has an infinite number of counterparts presented through the infinite number of attributes. Indeed, those infinite counterparts are that thing, presented through the other attributes. Substance necessarily expresses itself through the attributes and modes, according to Spinoza, and everything that is possible is also actual.5Spinoza's substance expresses itself through its attributes and modes, but what occurs at the level of the attributes and modes has no reciprocal effect on substance. Like unrequited love, expression is a one-way street. Not e pluribus unum (out of many, one), but e unibus plurum (out of one, many). Unlike the relation of the states to the federal government, the attributes and modes do not possess a relative or circumscribed autonomy vis-à-vis substance.6 Substance expressing itself through its attributes and modes is nature, according to Spinoza, and nature in turn is God. Hence, Spinoza's God is wholly immanent within the world—for him, God is the world—and so he rejects that traditional God of theism, who transcends and is wholly independent from the world. Spinoza rejects as illusory all notions of purpose and intention.7 Although individuals generally believe that their actions are performed in order to fulfill some goal, Spinoza instead maintains that human actions are entirely determined and necessary and that the belief that actions are done to accomplish something is entirely mistaken. He believes that all happenings—physical... (shrink)

I defend a view of the species category, pluralistic realism, which is designed to do justice to the insights of many different groups of systematists. After arguing that species are sets and not individuals, I proceed to outline briefly some defects of the biological species concept. I draw the general moral that similar shortcomings arise for other popular views of the nature of species. These shortcomings arise because the legitimate interests of biology are diverse, and these (...) diverse interests are reflected in different legitimate approaches to the classification of organisms. In the final section, I show briefly how the pluralistic approach can help to illuminate some areas of biological and philosophical dispute. (shrink)

Frank E. Zachos offers a comprehensive review of one of today's most important and contentious issues in biology: the species problem. After setting the stage with key background information on the topic, the book provides a brief history of species concepts from antiquity to the Modern Synthesis, followed by a discussion of the ontological status of species with a focus on the individuality thesis and potential means of reconciling it with other philosophical approaches. More than 30 different (...) species concepts found in the literature are presented in an annotated list, and the most important ones, including the Biological, Genetic, Evolutionary and different versions of the Phylogenetic Species Concept, are discussed in more detail. Specific questions addressed include the problem of asexual and prokaryotic species, intraspecific categories like subspecies and Evolutionarily Significant Units, and a potential solution to the species problem based on a hierarchical approach that distinguishes between ontological and operational species concepts. A full chapter is dedicated to the challenge of delimiting species by means of a discrete taxonomy in a continuous world of inherently fuzzy boundaries. Further, the book outlines the practical ramifications for ecology and evolutionary biology of how we define the species category, highlighting the danger of an apples and oranges problem if what we subsume under the same name ("species") is in actuality a variety of different entities. A succinct summary chapter, glossary and annotated list of references round out the coverage, making the book essential reading for all biologists looking for an accessible introduction to the historical, philosophical and practical dimensions of the species problem. (shrink)

Summary John Locke intervened in two major debates in which the issue of species featured: (1) the question of whether species designations are based on real essences or only nominal essences (discussed in the Essay), and (2) the debate over the recoinage of English currency in the 1690s, in which Locke argued for a restoration of silver depleted by widescale clipping (discussed in his economic writings published between 1692–95). This article investigates Locke's position on the recoinage and considers (...) alternative proposals in the period, including those which advocated the introduction of a ‘new species’ of money in the form of credit, based on land. Locke opened the space, philosophically, for innovations in defining money, but endorsed a narrower conception of money as silver by weight alone (not by its stamp or denomination). His rationale for doing so exposes his attachment to shared systems of measurement, intersubjective agreement and ways of stabilizing meaning by reference to external criteria (in this case, the weight of silver, a measure that functioned internationally). This suggests a pattern of attempting to constrain the nominalism that his system otherwise foregrounded. (shrink)

In the 1970s, the position that species are natural kinds characterized by essences came to be challenged, and was replaced by the view that species are individuals. To date, this remains the dominant position, at least among biologists, despite influential arguments that species can be construed as homeostatic property cluster kinds (employing a revised notion of essence). Recent philosophical discussions have broadened the scope by articulating a neo-Aristotelian essentialism for species, developing a post-essentialist account of human (...) nature, and scrutinizing temporal persistence conditions for species in the light of species de-extinction efforts. Yet most such current discussions concerning species have not relied on the notion of an essence, which also parallels recent accounts of natural kinds in the philosophy of science. (shrink)

v. 1. Classical roots and medieval discussions -- v. 2. Renaissance controversis, later scholasticism, and the elimination of the intelligible species in modern philosophy.

I defend a view of the species category, pluralistic realism, which is designed to do justice to the insights of many different groups of systematists. After arguing that species are sets and not individuals, I proceed to outline briefly some defects of the biological species concept. I draw the general moral that similar shortcomings arise for other popular views of the nature of species. These shortcomings arise because the legitimate interests of biology are diverse, and these (...) diverse interests are reflected in different legitimate approaches to the classification of organisms. In the final section, I show briefly how the pluralistic approach can help to illuminate some areas of biological and philosophical dispute. (shrink)

My goal in this paper is to account for the value of species in terms of the value of individual organisms that make them up. Many authors have pointed to an apparent conflict between a species preservationist ethic and moral theories that place value on individuals. I argue for an account of the worth of individual organisms grounded in the representational goals of those organisms. I claim thatthis account leads to an acceptably extensive species preservationist ethic.

There is now an awakening to and recognition of the emotionally complex lives of some non-human animals. While their forms of consciousness may vary, some are indeed conscious and deserve political consideration. What that political consideration ought to be is the central topic of this article. First, I argue that interspecies justice must be understood in terms of the relationships that foster individual flourishing of all concerned. The obstacles to such flourishing are the five faces of oppression famously identified by (...) Iris Marion Young: exploitation, marginalization, powerlessness, cultural imperialism, and violence. By extending Young’s concept of the social group to intra- and interspecies groups, we become more attuned to differences between and among species. Theorizing the existence of interspecies groups brings forward new avenues to explore oppression and simultaneously theorize its opposite – interspecies justice. Second, I argue that a positive theory of interspecies flourishing can be developed on the basis of Marx’s materialist philosophy and reclamation of species-being. Though Marx uses humanist language throughout the Economic and Philosophic Manuscripts of 1844, attention to his methodological commitments reveals that some non-human animals can no longer be excluded from the capability of flourishing and species-being. Some non-human animals are conscious, act purposefully, and labor creatively and must be included in our circle of moral and political concern. (shrink)

What are biological species? Aristotelians and Lockeans agree that they are natural kinds; but, evolutionary theory shows that neither traditional philosophical approach is truly adequate. Recently, Michael Ghiselin and David Hull have argued that species are individuals. This claim is shown to be against the spirit of much modern biology. It is concluded that species are natural kinds of a sort, and that any 'objectivity' they possess comes from their being at the focus of a consilience of (...) inductions. (shrink)

There is an interesting parallel between two debates in different domains of contemporary analytic philosophy. One is the endurantism– perdurantism, or three-dimensionalism vs. four-dimensionalism, debate in analytic metaphysics. The other is the debate on the species problem in philosophy of biology. In this paper I attempt to cross-fertilize these debates with the aim of exploiting some of the potential that the two debates have to advance each other. I address two issues. First, I explore what the case (...) of species implies regarding the feasibility of particular positions in the endurantism– perdurantism debate. I argue that the case of species casts doubt on the recent claim that three-dimensionalism and four-dimensionalism are equivalent descriptions of the same underlying reality. Second, and conversely, I examine whether the metaphysical worry about three-dimensionalism and four-dimensionalism can help us to better understand the nature of biological species. I show that analyzing the thesis that species are individuals against the background of the endurantism– perdurantism debate allows us to explicate two different ways in which this thesis can be interpreted. (shrink)

Book review of Richard A. Richards' The Species Problem: A Philosophical Analysis.

Marc Ereshefsky argues that pluralism about species suggests that the species concept is not theoretically useful. It is to be abandoned in favor of several concrete species concepts that denote real categories. While accepting species pluralism, the present paper rejects eliminativism about the species category. It is argued that the species concept is important and that it is possible to make sense of a general species concept despite the existence of different concrete (...) class='Hi'>species concepts. (shrink)

The species category is defined as thesmallest historical individual within which there is a parental pattern of ancestry and descent. The use of historical individual in this definition is consistent with the prevailing notion that speciesper se are not involved in processes — they are effects, not effectors. Reproductive isolation distinguishes biparental historical species from their parts, and it provides a basis for understanding the nature of the evidence used to discover historical individuals.

This chapter contains sections titled: Introduction Early Species Concepts—Linnaeus Biological Species Concepts Phylogenetic Species Concepts Species Concepts and Speciation Conclusions Postscript: Counterpoint References.

Species pluralism gives us reason to doubt the existence of the species category. The problem is not that species concepts are chosen according to our interests or that pluralism and the desire for hierarchical classifications are incompatible. The problem is that the various taxa we call 'species' lack a common unifying feature.

What are biological species? Aristotelians and Lockeans agree that they are natural kinds; but, evolutionary theory shows that neither traditional philosophical approach is truly adequate. Recently, Michael Ghiselin and David Hull have argued that species are individuals. This claim is shown to be against the spirit of much modern biology. It is concluded that species are natural kinds of a sort, and that any 'objectivity' they possess comes from their being at the focus of a consilience of (...) inductions. (shrink)

Species are generally considered to be the basic units of evolution, and hence to constitute spatio-temporally bounded entities. In addition, it has been argued that species also instantiate a natural kind. Evolution is fundamentally about change. The question then is how species can remain the same through evolutionary change. Proponents of the species qua individuals thesis individuate species through their unique evolutionary origin. Individuals, or spatio-temporally located particulars in general, can be bodies, objects, events, or (...) processes, or a combination of these. It is here argued that species are best understood as open or closed, causally integrated processual systems that also instantiate an historically conditioned homeostatic property cluster natural kind. (shrink)

If ecological systems are functionally organised, they can possess functions or malfunctions. Natural function would provide justification for conservationists to act for the protection of current ecological arrangements and control the presence of populations that create ecosystem malfunctions. Invasive species are often thought to be malfunctional for ecosystems, so functional arrangement would provide an objective reason for their control. Unfortunately for this prospect, I argue no theory of function, which can support such normative conclusions, can be applied to large (...) scale ecosystems. Instead ecological systems have causal structure, with small clusters of populations achieving functional arrangement. This, however, does not leave us without reason to control invasive species. We can look at the causal arrangement of ecological systems for populations that support ecological features that we should preserve. Populations that play a causal role in reducing biodiversity should be controlled, because biodiversity is a good all prudent agents should want to preserve. (shrink)

Richness theory offers an alternative to the paradigms that have dominated the short history of environmental ethics as a self-conscious field. This alternative theoretical paradigm defines intrinsic value as “richness”—a synonym for “organic unity” or “unity in diversity.” Richness theory can handily reconcile two kinds of ideas that seem to be in tension with each other:that (1) an individual human being has a greater worth than an individual organism of just about any other species; and (2) yet the world (...) would be a better place with substantially fewer humans and/or less consumption per capita, thus leaving more resources for other species.The mutual compatibility of such ideas within the framework of richness theory can be demonstrated both verbally and through a simplified mathematical model. (shrink)

There is no question that the constituents of cells and organisms are joined together by the part-whole relation. Genes are part of cells, and cells are part of organisms. Species taxa, however, have traditionally been conceived of, not as wholes with parts, but as classes with members. But why does the relation change abruptly from part-whole to class-membership above the level of organisms? Ghiselin, Hull and others have argued that it doesn't. Cells and organisms are cohesive mereological sums, and (...) since species taxa are like cells and organisms in the relevant respects, they, too, are cohesive mereological sums. I provide further reasons in support of the thesis that species are mereological sums. I argue, moreover, that the advocate of this thesis is committed to a form of pluralism with respect to the species concept. (shrink)

The formal definition of species as explanatory hypotheses presented by Fitzhugh is emended. A species is an explanatory account of the occurrences of the same character among gonochoristic or cross-fertilizing hermaphroditic individuals by way of character origin and subsequent fixation during tokogeny. In addition to species, biological systematics also employs hypotheses that are ontogenetic, tokogenetic, intraspecific, and phylogenetic, each of which provides explanatory hypotheses for distinctly different classes of causal questions. It is suggested that species hypotheses (...) can not be applied to organisms with obligate asexual, parthenogenetic, and self-fertilizing modes of reproduction. Hypotheses explaining shared characters among such organisms are, instead, strictly phylogenetic. Several implications of this emended definition are examined, especially the relations between species, intraspecific, and phylogenetic hypotheses, as well as the limitations of species names to be applied to temporally different characters within populations. (shrink)

Biologists and philosophers have long recognized the importance of species, yet species concepts serve two masters, evolutionary theory on the one hand and taxonomy on the other. Much of present-day evolutionary and systematic biology has confounded these two roles primarily through use of the biological species concept. Theories require entities that are real, discrete, irreducible, and comparable. Within the neo-Darwinian synthesis, however, biological species have been treated as real or subjectively delimited entities, discrete or nondiscrete, and (...) they are often capable of being decomposed into other, smaller units. Because of this, biological species are generally not comparable across different groups of organisms, which implies that the ontological structure of evolutionary theory requires modification. Some biologists, including proponents of the biological species concept, have argued that no species concept is universally applicable across all organisms. Such a view means, however, that the history of life cannot be embraced by a common theory of ancestry and descent if that theory uses species as its entities.These ontological and biological difficulties can be alleviated if species are defined in terms of evolutionary units. The latter are irreducible clusters of reproductively cohesive organisms that are diagnosably distinct from other such clusters. Unlike biological species, which can include two or more evolutionary units, these phylogenetic species are discrete entities in space and time and capable of being compared from one group to the next. (shrink)

This paper shows that species are individuals with respect to evolutionary theory in the sense that the laws of the theory deal with species as irreducible wholes rather than as sets of organisms. 'Species X' is an instantiation of a primitive term of the theory. I present a sketch of a proof that it cannot be defined within the theory as a set of organisms; the proof relies not on details of my axiomatization but rather on a (...) generally accepted property of speciation; hence the same argument should work for any axiomatization which captures this generally accepted property of speciation. (shrink)

This chapter contains sections titled: Historical and Current Views of Species Return to a Darwinian View of Species Practical Implications Postscript: Counterpoint References.

Speciesism, broadly understood as the view that species membership is a morally relevant property, has been a central topic of debate within animal ethics for around 50 years. However, in all this time, animal ethicists have paid relatively scant attention to the nature of species membership itself. This seems potentially regrettable, since species membership's precise nature is presumably highly pertinent to the question of its exact moral relevance. Here, I advocate for a ‘species-focused’ approach to assessing (...) speciesism, arguing that, in debating the merits of speciesism, animal ethicists should (i) centre the nature of species membership, and (ii) consult philosophers of biology. Adherence to this second prescription appears necessary since a lot of what philosophers of biology believe regarding the nature of species membership appears contrary to what many animal ethicists have seemingly assumed. (shrink)