Grandmothers are behind the adoption of monogamy
~!!~Hawkes suggested that when grandmothers contribute to making sure the youngest generation is well fed and taken care of, their daughters would be freed up to produce more offspring in a shorter amount of time//©
~!!~The recent study used computer population models to demonstrate that the grandmothers with an inclination to help their daughters raise more children actually passed along genes that code for behavior that increases longevity, including sticking with a single mate//©
~!!~The study shows how men and women interacted over a million~year time span// They found that over the course of 1 million years, grandmothering significantly increased the ratio of available males to females, maximizing the potential for population growth and thus survival//©