Modern sociobiologists concept perpetuation of individual gene pool like the fundamental human drive, and give numerous illustrations of behavior which apparently conflict along with the economist's homo economicus supposition: Parents sacrifice their whole lives for their children, or they invest into their kids' college educations therefore the subsequently generation will enjoy richer lives. Conversely, people adopt other people's biological children and several childless people are voluntarily sterilized or connect religious orders which need sexual self-denial. To what extent may perpetuation of one's gene pool conflict along with self-interested behavior? Which of such assumptions do you believe will more precisely predict human behavior?