Evelyn Fox Keller has documented how the masculine-identified public sphere and the feminine-identified private sphere have structured thinking in two areas of evolutionary biology: population genetics and mathematical ecology. Her concern is to show how the selection process that occurs in the context of discovery limits what we come to know. Keller argues that the assumption that the atomistic individual is the fundamental unit in nature has led population geneticists to omit sexual reproduction from their models. Though the critique of misplaced individualism is nothing new, the gender dynamics Keller reveals are. According to Keller, geneticists treat reproduction as if individuals reproduce themselves, effectively bypassing the complexities of sexual difference, the contingencies of mating, and fertilization. She likens the biologists' atomistic individual to heuristic individual portrayed by mainstream Western political and economic theorists. Keller argues further that biologists use values ascribed to the public sphere of Western culture to depict relations between individuals (while values generally attributed to the private sphere to describe relations are confused to the interior of an individual organism.)