Wim van der Steen charts conceptual foundations of evolutionary
biology and, on the basis of this, he evaluates applications of
evolutionary theory outside biology. Philosophical analysis shows
that key notions of the theory such as fitness, adaptation,
selection, and optimality are empty place-holder concepts that call
for context-dependent specifications of meaning. For example, as he
points out, the notion of optimality is empty without a
specification of constraints. Hence, the controversial thesis that
animals perform optimal behaviors as a result of natural selection
is meaningless rather than true or false. Analysis shows that many
other controversies in evolutionary biology are spurious. Thus, the
thesis of genic selectionism, which puts genes at center stage in
evolutionary theory, is best reconstructed as an arbitrary
conceptualization without substance. Disagreements over the thesis
are futile. They reflect preferences for different
conceptualizations which are ultimately equivalent.
As concepts are properly specified, van der Steen asserts
evolutionary theory turns out to be a body of interesting natural
history at a low level of generality. General laws of evolution do
not exist. Hence, evolutionary approaches do not allow sweeping
claims about human nature. Unfortunately, in disciplines outside
biology such claims are often defended with evolutionary
approaches. Evolutionary theory also cannot serve as a foundation
for normative views in ethics or epistemology. This is an important
and controversial work for scholars and advanced researchers in
biology and the philosophy of biology.
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