Michael Scriven’s (1959) example of identical twins (who are said to be equal in fitness but unequal in their reproductive success) has been used by many philosophers of biology to discuss how fitness should be defined, how selection should be distinguished from drift, and how the environment in which a selection process occurs should be conceptualized. Here it is argued that evolutionary theory has no commitment, one way or the other, as to whether the twins are equally fit. (...) This is because the theory of natural selection is fundamentally about the fitnesses of traits, not the fitnesses of token individuals. A plausible philosophical thesis about supervenience entails that the twins are equally fit if they live in identical environments, but evolutionary biology is not committed to the thesis that the twins live in identical environments. Evolutionary theory is right to focus on traits, rather than on token individuals, because the fitnesses of token organisms (as opposed to their actual survivorship and degree of reproductive success) are almost always unknowable. This point has ramifications for the question of how Darwin’s theory of evolution and R. A. Fisher’s are conceptually different. (shrink)

We argue that a fashionable interpretation of the theory of natural selection as a claim exclusively about populations is mistaken. The interpretation rests on adopting an analysis of fitness as a probabilistic propensity which cannot be substantiated, draws parallels with thermodynamics which are without foundations, and fails to do justice to the fundamental distinction between drift and selection. This distinction requires a notion of fitness as a pairwise comparison between individuals taken two at a time, and so vitiates (...) the interpretation of the theory as one about populations exclusively. (shrink)

Most agree that, in some special scenarios, prudence can speak against feeling a fitting emotion. Some go further, arguing that the tension between fittingness and prudence afflicts some emotions in a fairly general way. This paper goes even further: it argues that, when it comes to anxiety, the tension between fittingness and prudence is nearly inescapable. On any plausible theory, an enormous array of possible outcomes are both bad and epistemically uncertain in the right way to ground fitting anxiety. What’s (...) more, the fittingness of an emotion is a demanding, not a permissive, normative status. So the norms of fitting emotion demand a great deal of anxiety. For almost any realistic agent, it would be deeply imprudent to feel anxiety in a way that meets the demands set by norms of fitting emotion. (shrink)

Recent debate on the nature of probabilities in evolutionary biology has focused largely on the propensity interpretation of fitness (PIF), which defines fitness in terms of a conception of probability known as “propensity”. However, proponents of this conception of fitness have misconceived the role of probability in the constitution of fitness. First, discussions of probability and fitness have almost always focused on organism effect probability, the probability that an organism and its environment cause effects. I (...) argue that much of the probability relevant to fitness must be organism circumstance probability, the probability that an organism encounters particular, detailed circumstances within an environment, circumstances which are not the organism’s effects. Second, I argue in favor of the view that organism effect propensities either don’t exist or are not part of the basis of fitness, because they usually have values close to 0 or 1. More generally, I try to show that it is possible to develop a clearer conception of the role of probability in biological processes than earlier discussions have allowed. (shrink)

The propensity interpretation of fitness draws on the propensity interpretation of probability, but advocates of the former have not attended sufficiently to problems with the latter. The causal power of C to bring about E is not well-represented by the conditional probability Pr. Since the viability fitness of trait T is the conditional probability Pr, the viability fitness of the trait does not represent the degree to which having the trait causally promotes surviving. The same point holds (...) for fertility fitness. This failure of trait fitness to capture causal role can also be seen in the fact that coextensive traits must have the same fitness values even if one of them promotes survival and the other is neutral or deleterious. Although the fitness of a trait does not represent the trait’s causal power to promote survival and reproduction, variation in fitness in a population causally promotes change in trait frequencies; in this sense, fitness variation is a population-level propensity. (shrink)

It’s recently been argued that biological fitness can’t change over the course of an organism’s life as a result of organisms’ behaviors. However, some characterizations of biological function and biological altruism tacitly or explicitly assume that an effect of a trait can change an organism’s fitness. In the first part of the paper, I explain that the core idea of changing fitness can be understood in terms of conditional probabilities defined over sequences of events in an organism’s (...) life. The result is a notion of “conditional fitness” which is static but which captures intuitions about apparent behavioral effects on fitness. The second part of the paper investigates the possibility of providing a systematic foundation for conditional fitness in terms of spaces of sequences of states of an organism and its environment. I argue that the resulting “organism–environment history conception” helps unify diverse biological perspectives, and may provide part of a metaphysics of natural selection. (shrink)

It is a noteworthy disanalogy between contemporary ethics and aesthetics that the fitting-attitude account of value, so prominent in contemporary ethics, sees comparatively little play in aesthetics. The aim of this paper is to articulate what a systematic fitting-attitude-style framework for understanding aesthetic value might look like. In the bulk of the paper, I sketch possible fitting-attitude-style accounts of three central aesthetic values – the beautiful, the sublime, and the powerful – so that the general form of the framework come (...) through. (shrink)

How can we explain the rational diminution of backward-looking emotions without resorting to pragmatic or wrong kind of reason explanations? That is to say, how can the diminution of these emotions not only be rational but fitting? In this paper, I offer an answer to this question by considering the case of anger. In Sect. 1, I examine Pamela Hieronymi’s account of forgiveness as the rational resolution of resentment. I argue that Hieronymi’s account rests on an assumption about the rationality (...) of emotions —namely, that a rational change in emotion entails a change in the fact that constitutes the reason for the emotion. Then, in Sect. 2, I consider Agnes Callard’s recent criticism of accounts like Hieronymi’s as well as Callard’s alternative account of the rational resolution of anger. I argue that Callard offers a promising account but fails to explain how it avoids the criticism she levels against Hieronymi and others. Finally, in Sect. 3, I reject Hieronymi’s assumption and argue that an emotion can cease to be fitting without any change in the fact that constitutes the reason for it. I also explain how my proposal can complement Callard’s account of the rational dissipation of anger. My discussion of anger leads to a solution to the general problem about backward-looking emotions: a fitting backward-looking emotion can fittingly diminish when it is part of a process that is itself a fitting response to the past occurrence. (shrink)

The concept of fitness, central to population genetics and to the synthetic theory of evolution, is discussed. After a historical introduction on the origin of this concept, the current meaning of it in population genetics is examined: a cause of the selective process and its quantification. Several difficulties arise for its exact definition. Three adequacy criteria for such a definition are formulated. It is shown that it is impossible to formulate an adequate definition of fitness respecting these criteria. (...) The propensity definition of fitness is presented and rejected. Finally it is argued that fitness is a conceptual device, a useful tool, only for descriptive purposes of selective processes, changing from case to case, and thus devoid of any substantial physical counterpart. Any attempt to its reification is an apport to the metaphysical load evolutionary theory has inherited from Natural Theology. (shrink)

It has been argued that biological fitness cannot be defined as expected number of offspring in all contexts. Some authors argue that fitness therefore merely satisfies a common schema or that no unified mathematical characterization of fitness is possible. I argue that comparative fitness must be relativized to an evolutionary effect; thus relativized, fitness can be given a unitary mathematical characterization in terms of probabilities of producing offspring and other effects. Such fitnesses will sometimes be (...) defined in terms of probabilities of effects occurring over the long term, but these probabilities nevertheless concern effects occurring over the short term. †To contact the author, please write to: Department of Philosophy, University of Alabama at Birmingham, HB 414A, 900 13th Street South, Birmingham, AL 35294‐1260; e‐mail: [email protected] (shrink)

According to Fitting Attitude theorists, for something to possess a certain value it is necessary and sufficient that it be fitting (appropriate, or good, or obligatory, or something) to take a certain attitude to the bearer of that value. The idea seems obvious for thick evaluative attributes, but less obvious for the thin evaluative attributes—like goodness, betterness, and degrees of value. This paper is an extended argument for the thesis that the fitting response to the thin evaluative attributes of states (...) is desire, broadly construed. The good is what it is fitting to desire, the bad what it is fitting to be averse to, and the better what it is fitting to prefer. I start with two prominent challenges to the FA schema (Wrong Kinds of Reasons and Solitary Goods). For the FA schema to survive these challenges—along with some developments of them—the fitting response to the goodness of a state has to be a non-factive, non-doxastic representation of the state as good—in other words, an appearance of the goodness that state. That desires and preferences are non-doxastic value appearances is independently attractive, and I argue that this is in fact the simplest hypothesis compatible with the Fitting Attitude approach.Fitting Attitudes. (shrink)

The concept of "fitness" is a notion of central importance to evolutionary theory. Yet the interpretation of this concept and its role in explanations of evolutionary phenomena have remained obscure. We provide a propensity interpretation of fitness, which we argue captures the intended reference of this term as it is used by evolutionary theorists. Using the propensity interpretation of fitness, we provide a Hempelian reconstruction of explanations of evolutionary phenomena, and we show why charges of circularity which (...) have been levelled against explanations in evolutionary theory are mistaken. Finally, we provide a definition of natural selection which follows from the propensity interpretation of fitness, and which handles all the types of selection discussed by biologists, thus improving on extant definitions. (shrink)

Recently advocates of the propensity interpretation of fitness have turned critics. To accommodate examples from the population genetics literature they conclude that fitness is better defined broadly as a family of propensities rather than the propensity to contribute descendants to some future generation. We argue that the propensity theorists have misunderstood the deeper ramifications of the examples they cite. These examples demonstrate why there are factors outside of propensities that determine fitness. We go on to argue for (...) the more general thesis that no account of fitness can satisfy the desiderata that have motivated the propensity account. (shrink)

Biological fitness is a foundational concept in the theory of natural selection. Natural selection is often defined in terms of fitness differences as “any consistent difference in fitness (i.e., survival and reproduction) among phenotypically different biological entities” (Futuyma 1998, 349). And in Lewontin’s (1970) classic articulation of the theory of natural selection, he lists fitness differences as one of the necessary conditions for evolution by natural selection to occur. Despite this foundational position of fitness, there (...) remains much debate over the nature of fitness, especially whether fitness differences can truly be said to cause evolutionary change. In recent years these debates have crystalized into two camps: (1) causalists, who see fitness differences as being one of the causes of evolutionary change, and (2) statisticalists, who deny the causal efficacy of fitness and instead hold that “fitness is a mere statistical, noncausal property of trait types” (Walsh 2010, 148). (shrink)

According to historical theories of biological function, a trait's function is determined by natural selection in the past. I argue that, in addition to historical functions, ahistorical functions ought to be recognized. I propose a theory of biological function which accommodates both. The function of a trait is the way it contributes to fitness and fitness can only be determined relative to a selective regime. Therefore, the function of a trait can only be specified relative to a selective (...) regime. Apart from its desirable pluralism, only this view of relational function can support the function/accident and function/malfunction distinctions commonly thought to be part of the concept of function. Furthermore, only relational function correctly characterizes the explanatory consequences of function attributions in evolutionary biology. (shrink)

According to Fitting Attitude theorists, for something to possess a certain value it is necessary and sufficient that it be fitting to take a certain attitude to the bearer of that value. This seems obvious for thick evaluative attributes, but less obvious for thin evaluative attributes. This chapter argues that the fitting response to the thin evaluative attributes of states is desire. The good is what it is fitting to desire, the bad what it is fitting to be averse to, (...) and the better what it is fitting to prefer. For the FA schema to survive the challenges of “wrong kinds of reasons” and “solitary goods,” the fitting response to the goodness of a state has to be a non-factive, non-doxastic representation of the state as good. That desires and preferences are non-doxastic value appearances is independently attractive; this is the simplest hypothesis compatible with the Fitting Attitude approach. (shrink)

The concept of ‘semiotic fitting’ is what we provide as a model for the description and analysis of the diversity dynamics and nativeness in semiotic systems. One of its sources is the concept of ‘ecological fitting’ which was introduced by Daniel Janzen as the mechanism for the explanation of diversity in tropical ecosystems and which has been shown to work widely over the communities of various types. As different from the neo-Darwinian concept of fitness that describes reproductive success, ‘fitting’ (...) describes functional relations and aboutness. Diversity of a semiotic system is strongly dependent on the mutual fitting of agents of which the semiotic system consists. The focus on semiotic fitting means that, in the analysis of diversity, we pay particular attention to decision making, functional plasticity, recognition windows, the depth of interpretation of the agents, and the categories responsible for the structure of the semiotic system. The concept of semiotic fitting has an early analogue in Jakob von Uexküll’s concept of ‘Einpassung’. The close concepts of ‘semiotic fitness’, introduced by Jesper Hoffmeyer and by Stéphanie Walsh Matthews, ‘semiotic selection’, introduced by Timo Maran and Karel Kleisner, and ‘semiotic niche’, introduced by Hoffmeyer, provide different versions of the same model. If community is constructing itself on the basis of fitting, then nativeness of the community is a product of fitting, not vice versa. Nativeness is a feature that deepens in the course of community succession. The concept of ‘semiotic fitting’ demonstrates the possibility to analyse the role of both indigenous and alien species or other agents in a community on the basis of a single model. (shrink)

This is a thorough treatment of first-order modal logic. The book covers such issues as quantification, equality (including a treatment of Frege's morning star/evening star puzzle), the notion of existence, non-rigid constants and function symbols, predicate abstraction, the distinction between nonexistence and nondesignation, and definite descriptions, borrowing from both Fregean and Russellian paradigms.

The purpose of this paper is to present a new argument against so-called fitting attitude analyses of intrinsic value, according to which, roughly, for something to be intrinsically good is for there to be reasons to want it for its own sake. The argument is indirect. First, I submit that advocates of a fitting-attitude analysis of value should, for the sake of theoretical unity, also endorse a fitting-attitude analysis of a closely related but distinct concept: the concept of intrinsic value (...) for a person, i.e., the concept of welfare. Then I argue directly against fitting-attitude analyses of welfare. This argument, which is the focus of the paper, is based on the idea that whereas whether an event is good or bad for a person doesn’t change over time, the attitudes there is reason to have towards such an event can change over time. Therefore, one cannot explain the former in terms of the latter, as fitting-attitude analyses of welfare attempt to do. (shrink)

The diversity, complexity and adaptation of the biological realm is evident. Until Darwin, the best explanation for these three features of the biological was the conclusion of the “argument from design.” Darwin's theory of natural selection provides an explanation of all three of these features of the biological realm without adverting to some mysterious designing entity. But this explanation's success turns on the meaning of its central explanatory concept, ‘fitness’. Moreover, since Darwinian theory provides the resources for a purely (...) causal account of teleology, wherever it is manifested, its reliance on the concept of ‘fitness’ makes it imperative that conceptual problems threatening the explanatory legitimacy of this notion be solved. (shrink)

There are three related criteria that a concept of fitness should be able to meet: it should render the principle of natural selection non-tautologous and it should be explanatory and predictive. I argue that for fitness to be able to fulfill these criteria, it cannot be a property that changes over the course of an individual's life. Rather, I introduce a fitness concept--Block Fitness--and argue that an individual's genes and environment fix its fitness in such (...) a way that each individual's fitness has a fixed value over its lifetime. (shrink)

Beliefs can be correct or incorrect, and this standard of correctness is widely thought to be fundamental to epistemic normativity. But how should this standard be understood, and in what way is it so fundamental? I argue that we should resist understanding correctness for belief as either a prescriptive or an evaluative norm. Rather, we should understand it as an instance of the distinct normative category of fittingness for attitudes. This yields an attractive account of epistemic reasons.

According to the fitting attitude (FA) analysis of value concepts, to conceive of an object as having a given value is to conceive of it as being such that a certain evaluative attitude taken towards it would be fitting. Among the challenges that this analysis has to face, two are especially pressing. The first is a psychological challenge: the FA analysis must call upon attitudes that shed light on our value concepts while not presupposing the mastery of these concepts. The (...) second challenge is normative: the FA analysis must account for the fittingness of the relevant attitudes in terms of a kind of normativity intimately related to these attitudes, but again without presupposing the mastery of the relevant value concepts. In this paper, we show that real progress is possible if we pay close attention to the nature of the attitudes recruited by the analysis. More specifically, we claim that an FA analysis that appeals to emotions conceived as evaluative attitudes — as opposed to, for instance, evaluative judgements or evaluative perceptions — has the best prospects of meeting the two challenges and of putting the FA analysis on a strong footing. (shrink)

Some combinations of attitudes--of beliefs, credences, intentions, preferences, hopes, fears, and so on--do not fit together right: they are incoherent. A natural idea is that there are requirements of "structural rationality" that forbid us from being in these incoherent states. Yet a number of surprisingly difficult challenges arise for this idea. These challenges have recently led many philosophers to attempt to minimize or eliminate structural rationality, arguing that it is just a "shadow" of "substantive rationality"--that is, correctly responding to one's (...) reasons. -/- In *Fitting Things Together*, Alex Worsnip pushes back against this trend--defending the view that structural rationality is a genuine kind of rationality, distinct from and irreducible to substantive rationality, and tackling the most important challenges for this view. In so doing, he gives an original positive theory of the nature of coherence and structural rationality that explains how the diverse range of instances of incoherence can be unified under a general account, and how facts about coherence are normatively significant. He also shows how a failure to focus on coherence requirements as a distinctive phenomenon and distinguish them adequately from requirements of substantive rationality has led to confusion and mistakes in several substantive debates in epistemology and ethics. -/- Taken as a whole, Fitting Things Together provides the first sustained defense of the view that structural rationality is a genuine, autonomous, unified, and normatively significant phenomenon. (shrink)

Inclusive fitness has been under intense scrutiny in recent years, with many critics claiming the framework leads to incorrect predictions. We consider one particularly influential heuristic for estimating inclusive fitness in the context of the very case that motivated reliance on it to begin with: the Sir Philip Sidney signalling game played with relatives. Using a neighbour-modulated fitness model, we show when and why this heuristic is problematic. We argue that reliance on the heuristic rests on a (...) misunderstanding of what it means for two organisms to be related and perpetuates a mischaracterization of the role of the ‘relatedness’ parameter in inclusive fitness. _1_ Introduction _2_ Heuristic Inclusive Fitness _3_ The Sir Philip Sidney Game _4_ Model _5_ Results _6_ Conclusion Appendix. (shrink)

The central point of this essay is to demonstrate the incommensurability of ‘Darwinian fitness’ with the numeric values associated with reproductive rates used in population genetics. While sometimes both are called ‘fitness’, they are distinct concepts coming from distinct explanatory schemes. Further, we try to outline a possible answer to the following question: from the natural properties of organisms and a knowledge of their environment, can we construct an algorithm for a particular kind of organismic life-history pattern that (...) itself will allow us to predict whether a type in the population will increase or decrease relative to other types? Introduction Darwinian fitness Reproductive fitness and genetical models of evolution The models of reproductive fitness 4.1 The Standard Viability Model 4.2 Frequency-dependent selection 4.3 Fertility models 4.4 Overlapping generations Fitness as outcome 5.1 Fitness as actual increase in type 5.2 Fitness as expected increase in type 5.2.1 Expected increase within a generation 5.2.2 Expected increase between generations 5.2.3 Postponed reproductive fitness effects The book-keeping problem Conclusion. (shrink)

According to ‘Fitting Attitude’ (FA) analyses of value, for an object to be valuable is for that object to have properties—other than its being valuable—that make it a fitting object of certain responses. In short, if an object is positively valuable it is fitting to favour it; if an object is negatively valuable it is fitting to disfavour it. There are several variants of FA analyses. Some hold that for an object to be valuable is for it to be such (...) that it ought to be favoured; others hold that value is analyzable in terms of reasons or requirements to favour. All these variants of the FA analysis are subject to a partiality challenge : there are circumstances in which some agents have reasons to favour or disfavour some object—due to the personal relations in which they stand to the object—without this having any bearing on the value of the object. A. C. Ewing was one of the first philosophers to draw attention to the partiality challenge for FA analyses. In this paper I explain the challenge and consider Ewing's responses, one of which is preferable to the other, but none of which is entirely satisfactory. I go on to develop an alternative Brentano-inspired response that Ewing could have offered and that may well be preferable to the responses Ewing actually did offer. (shrink)

At one level, this paper is a lament and a warning. I lament biologists borrowing well-known terms and then drastically and awkwardly changing their meanings, and I warn about the mischief this does. Biology''s public image is at stake, as is its general usefulness. At another level, I attempt to clarify the misnamed concepts, beyond what has been achieved in recent philosophical writings. This helps to account for the mischief, and to see how it might be avoidable. But the most (...) important thing about the paper is that, at a third level, it is an argument against physicalism and materialism, especially those variants which deny the autonomy of organisms and the existence of intrinsic goods. Interpreting biology from the point of view of those denials leads to unsatisfactory and even bizarre results. (shrink)

We critically examine a number of aspects of Grafen’s ‘formal Darwinism’ project. We argue that Grafen’s ‘selection-optimality’ links do not quite succeed in vindicating the working assumption made by behavioural ecologists and others—that selection will lead organisms to exhibit adaptive behaviour—since these links hold true even in the presence of strong genetic and developmental constraints. However we suggest that the selection-optimality links can profitably be viewed as constituting an axiomatic theory of fitness. Finally, we compare Grafen’s project with Fisher’s (...) ‘fundamental theorem of natural selection’, and we speculate about whether Grafen’s results can be extended to a game-theoretic setting. (shrink)

The authors argue against direction of fit accounts of the distinction between belief and desire.

Individual-as-maximizing agent analogies result in a simple understanding of the functioning of the biological world. Identifying the conditions under which individuals can be regarded as fitness maximizing agents is thus of considerable interest to biologists. Here, we compare different concepts of fitness maximization, and discuss within a single framework the relationship between Hamilton’s (J Theor Biol 7:1–16, 1964) model of social interactions, Grafen’s (J Evol Biol 20:1243–1254, 2007a) formal Darwinism project, and the idea of evolutionary stable strategies. We (...) distinguish cases where phenotypic effects are additive separable or not, the latter not being covered by Grafen’s analysis. In both cases it is possible to define a maximand, in the form of an objective function ϕ(z), whose argument is the phenotype of an individual and whose derivative is proportional to Hamilton’s inclusive fitness effect. However, this maximand can be identified with the expression for fecundity or fitness only in the case of additive separable phenotypic effects, making individual-as-maximizing agent analogies unattractive (although formally correct) under general situations of social interactions. We also feel that there is an inconsistency in Grafen’s characterization of the solution of his maximization program by use of inclusive fitness arguments. His results are in conflict with those on evolutionary stable strategies obtained by applying inclusive fitness theory, and can be repaired only by changing the definition of the problem. (shrink)

In this paper I argue that Bykvist’s recent challenges to the fitting-attitude account of value (FA) can be successfully met. The challenge from solitary goods claims that FA cannot account for the value of states of affairs which necessarily rule out the presence of favouring subjects. I point out the modal reasons why FA can account for solitary goods by appealing to contemplative attitudes. Bykvist’s second challenge, the ‘distance problem’, questions the ability of FA to match facts about the intensity (...) of fitting attitudes and facts about value, particularly in the case of solitary goods. I argue that this challenge can be met by including the notion of a veil of ignorance in the formulation of FA, and understanding its role as bracketing the relevance of certain facts when determining the fittingness of attitudes to states of affairs. (shrink)

The concept of fitness began its career in biology long before evolutionary theory was mathematized. Fitness was used to describe an organism’s vigor, or the degree to which organisms “fit” into their environments. An organism’s success in avoiding predators and in building a nest obviously contribute to its fitness and to the fitness of its offspring, but the peacock’s gaudy tail seemed to be in an entirely different line of work. Fitness, as a term in (...) ordinary language (as in “physical fitness”) and in its original biological meaning, applied to the survival of an organism and its offspring, not to sheer reproductive output (Paul ////; Cronin 1991). Darwin’s separation of natural from sexual selection may sound odd from a modern perspective, but it made sense from this earlier point of view. (shrink)

Organisms' environments are thought to play a fundamental role in determining their fitness and hence in natural selection. Existing intuitive conceptions of environment are sufficient for biological practice. I argue, however, that attempts to produce a general characterization of fitness and natural selection are incomplete without the help of general conceptions of what conditions are included in the environment. Thus there is a "problem of the reference environment"—more particularly, problems of specifying principles which pick out those environmental conditions (...) which determine fitness. I distinguish various reference environment problems and propose solutions to some of them. While there has been a limited amount of work on problems concerning what I call "subenvironments", there appears to be no earlier work on problems of what I call the "whole environment". The first solution I propose for a whole environment problem specifies the overall environment for natural selection on a set of biological types present in a population over a specified period of time. The second specifies an environment relevant to extinction of types in a population; this kind of environment is especially relevant to certain kinds of long-term evolution. (shrink)

Recent philosophical discussions have failed to clarify the roles of the concept fitness in evolutionary theory. Neither the propensity interpretation of fitness nor the construal of fitness as a primitive theoretical term succeed in explicating the empirical content and explanatory power of the theory of natural selection. By appealing to the structure of simple mathematical models of natural selection, we separate out different contrasts which have tended to confuse discussions of fitness: the distinction between what (...) class='Hi'>fitness is defined as versus what fitness is a function of, the contrast between adaptedness as an overall property of organisms and specific adaptive capacities, the distinction between actual and potential reproductive success, the role of chance versus systematic causal relations, fitness as applied to organisms as opposed to fitness applied to genotype classes, heritable adaptive capacities of genotypes as opposed to relations between genotypes and the environment. We show how failure to distinguish and properly interrelate these different aspects of “fitness” adds confusion to a number of already complex issues concerning evolutionary theory. On the basis of our discussion of these different aspects of “fitness”, we propose a terminology which makes the necessary distinctions. A central result of our analysis is that the concept of fitness as the overall adaptedness of organisms does not enter into the causal structure of evolutionary explanation, at least to the extent that this structure is represented in the mathematical models of natural selection. (shrink)

Philosophers have shown that the Aristotelian conception of mind and body is capable of resolving the problems confronting dualism. In this paper the resolution of the mind–body problem is extended with a scientific solution by integrating the Aristotelian framework with evolutionary theory. It is discussed how the theories of Fisher and Hamilton enable us to construct and solve hypotheses about how the mind evolved out of matter. These hypotheses are illustrated by two examples: the evolutionary transition from cells to multicellular (...) organisms, and the evolutionary transition from babbling to doing things with words and later reasoning and giving reasons. The first transitions resulted in the sensitive psyche of the other animals, the second in the rational psyche of humans. It is discussed how exploratory behaviour of lower-level entities facilitated these evolutionary transitions. (shrink)

I distinguish two roles for a fitness concept in the context of explaining cumulative adaptive evolution: fitness as a predictor of gene frequency change, and fitness as a criterion for phenotypic improvement. Critics of inclusive fitness argue, correctly, that it is not an ideal fitness concept for the purpose of predicting gene-frequency change, since it relies on assumptions about the causal structure of social interaction that are unlikely to be exactly true in real populations, and (...) that hold as approximations only given a specific type of weak selection. However, Hamilton took this type of weak selection, on independent grounds, to be responsible for cumulative assembly of complex adaptations. In this special context, I argue that inclusive fitness is distinctively valuable as a criterion for improvement and a standard for optimality. Yet to call inclusive fitness a criterion for improvement and a standard for optimality is not to make any claim about the frequency with which inclusive fitness optimization actually occurs in nature. This is an empirical question that cannot be settled by theory alone. I close with some reflections on the place of inclusive fitness in the long running clash between ‘causalist’ and ‘statisticalist’ conceptions of fitness. (shrink)

ABSTRACTThe article investigates which epistemological considerations justify how religious life fits into the school life, and examines the debate on the participation of religiosity in the education system. I do this, first, by addressing the pedagogical implications of the distinction between public and private as maintained by Richard Rorty and, second, by reconsidering the pluralist metaphysics held by William James as an alternative path to understanding and re-addressing the question of religious life in school life. The article analyzes how the (...) strict separation of projects of individual self-creation and the public sphere, as defended by Rorty, poses problems in implementing pluralism in democratic societies and their educational institutions. (shrink)

I argue that fitting envy plays a special role in safeguarding our happiness and flourishing. After presenting my theory of envy and its fittingness conditions, I contrast Kant’s view that envy is always unfitting with D’Arms and Jacobson’s defense of fitting envy as an evolutionarily-shaped response to a deep and wide human concern, that is, relative positioning. However, D’Arms and Jacobson don’t go far enough. First, I expand on their analysis of positional goodness, distinguishing between an epistemic claim, according to (...) which we use implicit or explicit comparison to know what position we occupy in a continuum of goodness, and thus to form judgments of goodness, and a metaphysical one, according to which much human goodness depends on implicit or explicit rankings and positionality. Second, I argue that fitting envy is not only intrinsically valuable qua fitting response to authentic goodness, but can be epistemically, morally and prudentially valuable. (shrink)

Many authors, including Derek Parfit, T. M. Scanlon, and Mark Schroeder, favor a “reasons-first” ontology of normativity, which treats reasons as normatively fundamental. Others, most famously G. E. Moore, favor a “value-first” ontology, which treats value or goodness as normatively fundamental. Chapter 10 argues that both the reasons-first and value-first ontologies should be rejected because neither can account for all of the normative reasons that, intuitively, there are. It advances an ontology of normativity, originally suggested by Franz Brentano and A. (...) C. Ewing, according to which fittingness is normatively fundamental. The normative relation of fittingness is the relation in which a response stands to an object when the object merits—or is worthy of—that response. The author argues that his “fittingness-first” ontology is no less parsimonious than either the reasons- or the value-first ontology, but it can plausibly accommodate the existence of all the normative reasons there are. It therefore provides a superior ontology of normativity. (shrink)

We defend a fitting-attitude theory of the funny against a set of potential objections. Ultimately, we endorse a version of FA theory that treats reasons for amusement as non-compelling, metaphysically non-conditional, and alterable by social features of the joke telling context. We find that this version of FA theory is well-suited to accommodate our ordinary practices of telling and being amused by jokes, and helpfully bears on the related faultless disagreement dispute.

Bilattices, due to M. Ginsberg, are a family of truth value spaces that allow elegantly for missing or conflicting information. The simplest example is Belnap’s four-valued logic, based on classical two-valued logic. Among other examples are those based on finite many-valued logics, and on probabilistic valued logic. A fixed point semantics is developed for logic programming, allowing any bilattice as the space of truth values. The mathematics is little more complex than in the classical two-valued setting, but the result provides (...) a natural semantics for distributed logic programs, including those involving confidence factors. The classical two-valued and the Kripke/Kleene three-valued semantics become special cases, since the logics involved are natural sublogics of Belnap’s logic, the logic given by the simplest bilattice. (shrink)

The diversity, complexity and adaptation of the biological realm is evident. Until Darwin, the best explanation for these three features of the biological was the conclusion of the “argument from design.” Darwin's theory of natural selection provides an explanation of all three of these features of the biological realm without adverting to some mysterious designing entity. But this explanation's success turns on the meaning of its central explanatory concept, ‘fitness’. Moreover, since Darwinian theory provides the resources for a purely (...) causal account of teleology, wherever it is manifested, its reliance on the concept of ‘fitness’ makes it imperative that conceptual problems threatening the explanatory legitimacy of this notion be solved. (shrink)

An analogue of Arrow’s theorem has been thought to limit the possibilities for multi-criterial theory choice. Here, an example drawn from Toy Science, a model of theories and choice criteria, suggests that it does not. Arrow’s assumption that domains are unrestricted is inappropriate in connection with theory choice in Toy Science. There are, however, variants of Arrow’s theorem that do not require an unrestricted domain. They require instead that domains are, in a technical sense, ‘rich’. Since there are rich domains (...) in Toy Science, such theorems do constrain theory choice to some extent—certainly in the model and perhaps also in real science. (shrink)

In this paper I discuss recent debates concerning etiological theories of functions. I defend an etiological theory against two criticisms, namely the ability to account for malfunction, and the problem of structural doubles. I then consider the arguments provided by Bigelow and Pargetter (1987) for a more forward looking account of functions as propensities or dispositions. I argue that their approach fails to address the explanatory problematic for which etiological theories were developed.