Not done Sir, but doing.

Plenty is doing.

"Draper and Harpending (1982, J.Anthropol. Res.) proposed that father absence was a critical determinant of later reproductive strategy. Due to learned perceptions about the predictability of the environment, low-income and father-absent families were said to adopt an opportunistically oriented r-strategy of high "mating effort"..... They concluded that "father-present societies are those where most males act like dads and father-absent societies are those where most males act like cads".... In....over 900 16-year-old New Zealand conflict and father absence in childhood predicted an earlier age of menarche, independent of body weight."

J. Philippe RUSHTON, 1995, Race, Evolution and Behavior: A Life History Perspective. New Brunswick, NJ : Transaction Publishers.

Disclaimer: this quote appears here only to spark discussion. It is not endorsed one way or the other. Make up your own mind. Or just refresh the page for another viewpoint. From a collection assembled by the late Chris Brand.