Chapter 6 of Gregory Cochran and Henry Harpending’s The 10,000 Year Explosion: How Civilization Accelerated Human Evolution(2009) is called “Expansions,” and examines the genetic effects of large-scale migrations of human beings.
History is filled with examples of certain population groups that conquer, migrate into, or spread over large areas and replace other groups, or replace other groups with some mixing.
Cochran and Harpending (2009: 156) accept that cultural and technological advantages have played a large role in the success of such movements, but also contend that sometimes, in important cases, evolutionary genetic traits have also been a factor. In this respect, as in normal evolutionary theory, we must look at group fitness, and not just individual fitness, as factors in human history (Cochran and Harpending 2009: 158).
Social Democracy For The 21St Century: A Post Keynesian Perspective
