It's erm in fact a quote from  Wilson, the founder of Socio-biology, the mo in other words modern er Darwinism as oppo as, as a applied to animal behaviour and  Wilson's point in saying that sex is an anti-social force in evolution was to suggest that what is really happening is that if natural selection is a question of the reproductive success of individual genes, then individuals should be motivated to produce as many copies of those genes as they possibly can, and that will inevitably bring them into competition with other members of the species who wanna do exactly the same thing.