Sober (1992) has recently evaluated Brandon's (1982, 1990; see also 1985, 1988) use of Salmon's (1971) concept of screening-off in the philosophy of biology. He critiques three particular issues, each of which will be considered in this discussion.
In this paper I argue that we can best make sense of the practice of experimental evolutionary biology if we see it as investigating contingent, rather than lawlike, regularities. This understanding is contrasted with the experimental practice of certain areas of physics. However, this presents a problem for those who accept the Logical Positivist conception of law and its essential role in scientific explanation. I address this problem by arguing that the contingent regularities of evolutionary biology have a limited range (...) of nomic necessity and a limited range of explanatory power even though they lack the unlimited projectibility that has been seen by some as a hallmark of scientific laws. (shrink)
In this paper we first briefly review Bell's (1964, 1966) Theorem to see how it invalidates any deterministic "hidden variable" account of the apparent indeterminacy of quantum mechanics (QM). Then we show that quantum uncertainty, at the level of DNA mutations, can "percolate" up to have major populational effects. Interesting as this point may be it does not show any autonomous indeterminism of the evolutionary process. In the next two sections we investigate drift and natural selection as the locus of (...) autonomous biological indeterminacy. Here we conclude that the population-level indeterminacy of natural selection and drift are ultimately based on the assumption of a fundamental indeterminacy at the level of the lives and deaths of individual organisms. The following section examines this assumption and defends it from the determinists' attack. Then we show that, even if one rejects the assumption, there is still an important reason why one might think evolutionary theory (ET) is autonomously indeterministic. In the concluding section we contrast the arguments we have mounted against a deterministic hidden variable account of ET with the proof of the impossibility of such an account of QM. (shrink)
Richard Lewontin's (1970) early work on the units of selection initiated the conceptual and theoretical investigations that have led to the hierarchical perspective on selection that has reached near consensus status today. This paper explores other aspects of his work, work on what he termed continuity and quasi-independence, that connect to contemporary explorations of modularity in development and evolution. I characterize such modules and argue that they are the true units of selection in that they are what evolution by natural (...) selection individuates, selects among, and transforms. (shrink)
The concept of individuality as applied to species, an important advance in the philosophy of evolutionary biology, is nevertheless in need of refinement. Four important subparts of this concept must be recognized: spatial boundaries, temporal boundaries, integration, and cohesion. Not all species necessarily meet all of these. Two very different types of pluralism have been advocated with respect to species, only one of which is satisfactory. An often unrecognized distinction between grouping and ranking components of any species concept is necessary. (...) A phylogenetic species concept is advocated that uses a (monistic) grouping criterion of monophyly in a cladistic sense, and a (pluralistic) ranking criterion based on those causal processes that are most important in producing and maintaining lineages in a particular case. Such causal processes can include actual interbreeding, selective constraints, and developmental canalization. The widespread use of the biological species concept is flawed for two reasons: because of a failure to distinguish grouping from ranking criteria and because of an unwarranted emphasis on the importance of interbreeding as a universal causal factor controlling evolutionary diversification. The potential to interbreed is not in itself a process; it is instead a result of a diversity of processes which result in shared selective environments and common developmental programs. These types of processes act in both sexual and asexual organisms, thus the phylogenetic species concept can reflect an underlying unity that the biological species concept can not. (shrink)
Reciprocal altruism was originally formulated in terms of individual selection and most theorists continue to view it in this way. However, this interpretation of reciprocal altruism has been challenged by Sober and Wilson (1998). They argue that reciprocal altruism (as well as all other forms of altruism) evolves by the process of group selection. In this paper, we argue that the original interpretation of reciprocal altruism is the correct one. We accomplish this by arguing that if fitness attaches to (at (...) minimum) entire life cycles, then the kind of fitness exchanges needed to form the group-level in such situations is not available. Reciprocal altruism is thus a result of individual selection and when it evolves, it does so because it is individually advantageous. (shrink)
Two conditions for internal peace : absolutism and identification --Four approaches to Leviathan -- Outline of a new approach -- Reason, natural law, and absolutism -- The role of part 1 in Leviathan -- The metaphysical conception of human nature -- The state of nature -- The argument for absolutism -- Criteria for the identification of the sovereign -- Natural law -- Reason, revelation, and the interpretation of scripture -- Historical background : sola scriptura and biblical criticism -- Hobbes and (...) sola scriptura -- Sola scriptura and revelation -- Principles of biblical interpretation -- Metaphysics and eschatology -- Metaphysics : body and spirit -- The kingdom of God -- Eschatology -- Church and state -- Politics and the problem of double vision -- Politics and metaphysics -- Case A and the kingdom of God -- Case B and the argument for the identification of the true sovereign according to scripture -- The theological-philosophical argument for absolutism -- Hobbes and the kingdom of darkness -- The kingdom of darkness -- Misinterpretations of Scripture -- The false foundations of church tradition -- The kingdom of fairies -- The religious sincerity of Thomas Hobbes. (shrink)
Millstein [Bio. Philos. 17 (2002) 33] correctly identies a serious problem with the view that natural selection and random drift are not conceptually distinct. She offers a solution to this problem purely in terms of differences between the processes of selection and drift. I show that this solution does not work, that it leaves the vast majority of real biological cases uncategorized. However, I do think there is a solution to the problem she raises, and I offer it here. My (...) solution depends on solving the biological analogue of the reference class problem in probability theory and on the reality of individual fitnesses. (shrink)
Genic selectionists (Williams 1966; Dawkins 1976) defend the view that genes are the (unique) units of selection and that all evolutionary events can be adequately represented at the genic level. Pluralistic genic selectionists (Sterelny and Kitcher 1988; Waters 1991; Dawkins 1982) defend the weaker view that in many cases there are multiple equally adequate accounts of evolutionary events, but that always among the set of equally adequate representations will be one at the genic level. We describe a range of cases (...) all involving stable equilibria actively maintained by selection. In these cases genotypic models correctly show that selection is active at the equilibrium point. In contrast, the genic models have selection disappearing at equilibrium. For deterministic models this difference makes no difference. However, once drift is added in, the two sets of models diverge in their predicted evolutionary trajectories. Thus, contrary to received wisdom on this matter, the two sets of models are not empirically equivalent. Moreover, the genic models get the facts wrong. (shrink)
This note discusses the implications of an incorrect quotation that appeared in Ted H. Miller's article, 'Thomas Hobbes and the Constraints that Enable the Imitation of God', from Inquiry 42.2 (1999). Although surely inadvertent, this error is significant because the author uses it to support the thesis that Hobbes envisions philosophers imitating God by creating order out of chaos. The correct quotation from Leviathan does not support such a thesis, and the paragraph in Leviathan from which it is (...) taken actually runs counter to it. The correct quotation, taken in its context, and a passage from De Corpore cited by Professor Miller reveal that Hobbes encourages philosophers to imitate God by following the order of creation in contemplation. In other words, philosophers imitate God by imitating the creation. (shrink)
This paper is divided into three sections. In the first section we offer a retooling of some traditional concepts, namely icons and symbols, which allows us to describe an evolutionary continuum of communication systems. The second section consists of an argument from theoretical biology. In it we explore the advantages and disadvantages of phenotypic plasticity. We argue that a range of the conditions that selectively favor phenotypic plasticity also favor a nongenetic transmission system that would allow for the inheritance of (...) acquired characters. The first two sections are independent, the third depends on both of them. In it we offer an argument that human natural languages have just the features required of an ideal transmission mechanism under the conditions described in section 2. (shrink)
Darwin's theory of evolution by natural selection provided the first, and only, causal-mechanistic account of the existence of adaptations in nature. As such, it provided the first, and only, scientific alternative to the “argument from design”. That alone would account for its philosophical significance. But the theory also raises other philosophical questions not encountered in the study of the theories of physics. Unfortunately the concept of natural selection is intimately intertwined with the other basic concepts of evolutionary theory—such as the (...) concepts of fitness and adaptation —that are themselves philosophically controversial. Fortunately we can make considerable headway in getting clear on natural selection without solving all of those outstanding problems. (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.
In this paper Wimsatt's analysis of units of selection is taken as defining the units of selection question. A definition of levels of selection is offered and it is shown that the levels of selection question is quite different from the units of selection question. Some of the relations between units and levels are briefly explored. It is argued that the levels of selection question is the question relevant to explanatory concerns, and it is suggested that it is the question (...) relevant to ontological concerns. (shrink)
Kary (1990) defends the view that evolution by natural selection can be adequately explained in terms of a theory incorporating only a single level of selection. Here I point out some of the inherent inadequacies of such a theory.
These days 'evolution' is usually defined as any change in the relative frequencies of genes in a population over time. This definition and some obvious alternatives are examined and rejected. The criticism of these definitions points out the need for a more holistic analysis of genotypes. I attempt such analysis by introducing measures of similarity of whole genotypes and then by grouping genotypes into similarity classes. Three sorts of measures of similarity are examined: a measure of structural similarity, a measure (...) of functional similarity and one of relational or historical similarity. The functional approach is shown to be superior and a definition of 'evolution' is suggested. (shrink)
In this paper the common association between ontological reductionism and a methodological position called 'Mechanism' is discussed. Three major points are argued for: (1) Mechanism is not to be identified with reductionism in any of its forms; in fact, mechanism leads to a non-reductionist ontology. (2) Biological methodology is thoroughly mechanistic. (3) Mechanism is compatible with at least one form of teleology. Along the way the nature and value of scientific explanations, some recent controversies in biology and why reductionism has (...) proven to be such an attractive position are discussed. (shrink)
Company support for employee volunteerism (CSEV) benefits companies, employees, and society while helping companies meet the expectations of corporate social responsibility (CSR). A nationally representative telephone survey of 990 Canadian companies examined CSEV through the lens of Porter and Kramer’s (2006, ‘Strategy and society: the link between competitive advantage and corporate social responsibility’, Harvard Business Review , 78–92.) CSR model. The results demonstrated that Canadian companies passively support employee volunteerism in a variety of ways, such as allowing employees to take (...) time off without pay (71%) or adjusting their work schedules (78%). These Responsive CSR efforts contribute to the company’s value chain by enhancing employee morale, a perceived CSEV benefit. More active forms of support requiring company time or money are less common; for example, 29% allow time off with pay. Companies perceive that support for employee volunteering enhances their public image, a Responsive CSR strategy when employed to ameliorate a damaged reputation or a Strategic CSR strategy when contributing to a competitive position. A minority perceive challenges like covering the workload. Many companies target and/or exclude particular causes and link CSEV efforts with other philanthropic donations, suggesting a Strategic CSR application of CSEV. Where programs exist, they frequently are neither tracked nor evaluated, suggesting that companies are not using these programs as strategically as they might. (shrink)
The principle of natural selection is stated. It connects fitness values (actual reproductive success) with expected fitness values. The term 'adaptedness' is used for expected fitness values. The principle of natural selection explains differential fitness in terms of relative adaptedness. It is argued that this principle is absolutely central to Darwinian evolutionary theory. The empirical content of the principle of natural selection is examined. It is argued that the principle itself has no empirical biological content, but that the presuppositions of (...) its applicability are empirical. They form the empirical biological core of evolutionary theory. (shrink)
While "A needs X" often calls for supplementation by the Y X is needed for, Thomson, Wiggins and Braybrooke have argued that there is a sense of "need" for which this is unnecessary. But Gricean conventions for conversation allow us to use ellipsis in a unified account of "need" while explaining the data Thomson and Wiggins appeal to: nondetatchment of bare needs from more fully specified ones, avoidance of serious harm as a default filling of the Y-slot, and the apparent (...) normativeness of some need-statements. Their detailed discussions also undermine the utility of demarcating a sense of "fundamental" need. (shrink)