littlebabyjesus
one of Maxwell's demons
Bit of a digression, but I think this quote shows how Gould's been taken the wrong way:
All he is saying here is that evolution can and does only work with what is there. But he is merely expanding on the way we should look at natural selection, not at all suggesting that it isn't the mechanism by which evolution occurs.
We do not inhabit a perfected world where natural selection ruthlessly scrutinizes all organic structures and then molds them for optimal utility. Organisms inherit a body form and a style of embryonic development; these impose constraints upon future change and adaptation. In many cases, evolutionary pathways reflect inherited patterns more than current environmental demands. These inheritances constrain, but they also provide opportunity. A potentially minor genetic change […] entails a host of complex, nonadaptive consequences. […] What “play” would evolution have if each structure were built for a restricted purpose and could be used for nothing else? How could humans learn to write if our brain had not evolved for hunting, social cohesion, or whatever, and could not transcend the adaptive boundaries of its original purpose?
All he is saying here is that evolution can and does only work with what is there. But he is merely expanding on the way we should look at natural selection, not at all suggesting that it isn't the mechanism by which evolution occurs.