The Frailty of the Darwinian Hypothesis, Part 2

In the previous post I described the debate among evolutionary biologists over the so-called adaptive hypothesis. Some biologists believe that natural selection has the power to drive evolution in adaptive directions, and that most changes that we observe in organisms are there because they confer some adaptive benefit. Other biologists believe that most of the changes we see in organisms over time are due to neutral, non-adaptive processes. You don’t need to take my word for the existence of this debate. Michael Lynch, an eminent evolutionary biologist, lays out the case against the power of natural selection in a paper called “The Frailty of the Adaptive Hypothesis,” 1 published a few years ago for an evolutionary symposium. In it he Read More ›