University College London's Steve Jones says that human evolution is slowing down due to a number of factors, including life expectancy, different timing of reproduction (particularly for men), and intermarriage. Both Gene Expression's Razib and Evolving Thought's John Wilkins say this isn't so. Razib unpacks Jones's arguments to walk through how population genetics really works. Wilkins writes, "Actual studies on wild populations show that evolution is not a monotonous gradual process always and everywhere the same, but a process of fits and starts, diffusion and collection, and where one pressure is removed, others take its place immediately."
Or are we accelerating?