“Not many people realize that the most important sexual revolution for our species probably happened several million years ago,” Gavrilets says. “This revolution was accomplished by the masses of lower-ranked males, along with females, directly against the elite of alphas, so the term revolution is even more appropriate.”

Read more:

http://healthland.time.com/2012/05/29/the-ancient-sexual-revolution-that-may-have-spurred-human-monogamy/