Summary:

- The article discusses the work of geneticist David Reich, who has found evidence supporting the theories of anthropologist Gregory Cochran regarding the rapid evolution of certain human populations.

- Cochran had proposed that some human populations experienced accelerated genetic changes due to the adoption of new technologies and lifestyles, such as the development of agriculture. Reich's research on ancient DNA samples has provided support for this idea.

- The article suggests that Reich's findings vindicate Cochran's controversial theories and challenge the conventional view that human evolution has been a slow, gradual process. It highlights the importance of considering rapid evolutionary changes in understanding human history and diversity.