This is interesting, I had never heard an estimate that high: A team led by University of Wisconsin-Madison anthropologist John Hawks estimates that positive s

This is interesting, I had never heard an estimate that high: A team led by University of Wisconsin-Madison anthropologist John Hawks estimates that positive selection just in the past 5,000 years alone -dating back to the Stone Age - has occurred at a rate roughly 100 times higher than any other period of human evolution. Many of the new genetic adjustments are occurring around changes in the human diet brought on by the advent of agriculture, and resistance to epidemic diseases that became major killers after the growth of human civilizations.