The duality of life -- Obsessed with genes -- Chickens and eggs : the two sides of life -- The natural economy -- The consequences of baby making -- Economics + babies + time = evolution -- Clones, colonies, and social life -- Human singularities -- Naught so queere as folke : the strange biology of modern humans -- The human triangle -- Sex decoupled -- Up close and personal : sex, power, money, and babies -- Sex, economics, and babies in social systems -- A moral to the story.