In article <1992Apr24.171702.17198 at yang.earlham.edu>, allens at yang.earlham.edu (Allen Smith) writes:
>>> I haven't read the book, but I can see a problem in that what
> determines evolutionary fitness will be entirely dependent upon the
> external and internal (genetic, etc.) environment. Being a whitish-grey
> moth works fine- until pollution blackens the trees.
>>Perhaps he has in mind the endogenous rate of evolution, including drift.