Cora May Williams, A Review of the Systems of Ethics Founded on the Theory of Evolution
“ For, while the "social instinct," the desire for and pleasure in all the various function connected with association with other beings, may be of assistance in bringing about any advance in association, the selfish instinct, already in existence before the evolution of any considerable degree of altruistic impulse, may influence and induce the advance, where the social instinct is not, alone, of sufficient strength. At the beginning of social life, as at every later point of advancement, motives are mixed, and selfishness may prepare the way for unselfishness. ”
