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Leigh van Valen [7]Leigh M. Van Valen [5]
  1.  34
    Ecological Species, Multispecies, and Oaks.Leigh Van Valen - 1976 - Taxon 25 (2/3):233-239.
    Oaks exemplify problems with the reproductive species concept which motivate a reconsideration of the use and nature of species. Ecology is important in the reconsideration. The species level is usually overemphasized in evolutionary thought; selection acts on phenotypes and any mutualistic units. Standard definitions tend to inhibit free conceptual progress. Multispecies, sets of broadly sympatric species that exchange genes, may occur among animals as well as plants and may conceivably bridge kingdoms. This phenomenon can be adaptively important. There may be (...)
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  2.  13
    Individualistic Classes.Leigh van Valen - 1976 - Philosophy of Science 43 (4):539-541.
  3.  60
    How Ubiquitous is Adaptation? A Critique of the Epiphenomenist Program.Leigh Van Valen - 2009 - Biology and Philosophy 24 (2):267-280.
    It is important to distinguish adaptation per se (adaptedness, or being adapted) from the more specific concept of adaptation for some function. Commonly used criteria for adaptation in either sense have limited applicability. There are, however, a number of widely applicable criteria for adaptation per se, such as several kinds of cost, low variation, the maintenance of integration, and the fitness distribution of mutations. Application of these criteria leads to the conclusion that adaptation is overwhelmingly prevalent for features of organisms. (...)
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  4. On Evolutionary Theories.Leigh van Valen - 1963 - British Journal for the Philosophy of Science 14:146.
  5.  7
    Species, Sets, and the Derivative Nautre of Philosophy.Leigh M. Van Valen - 1988 - Biology and Philosophy 3 (1):49.
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  6.  13
    Surrogate Resources, Cumulative Selection, and Fertility.Leigh M. Van Valen & Virginia C. Maiorana - 1986 - Behavioral and Brain Sciences 9 (1):209-209.
  7.  32
    Zeno and Continuity.Leigh Van Valen - 1968 - Mind 77:429.
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  8.  14
    On Interdisciplinary and Such.Leigh M. Van Valen - 1996 - Biology and Philosophy 11 (2):255-257.
  9.  3
    The Control of Handedness.Leigh Van Valen - 1978 - Behavioral and Brain Sciences 1 (2):320-320.
  10.  9
    Instinct and Innateness: Information in Causes.Leigh M. Van Valen - 1991 - Behavioral and Brain Sciences 14 (2):351-351.
  11.  6
    Why is There More Than One Neurotransmitter?Leigh M. Van Valen - 1982 - Behavioral and Brain Sciences 5 (2):294-295.