How the markets work because of human nature, how competitive status-striving and social cooperation interact synergistically to create cultural evolution (both social and technical) which has entirely transformed the human environment (see
Genetic-Cultural Coevolution). This differs in several ways from standard economic assumptions, most obviously because economists have chosen a wildly inaccurate model of human behavior, but also because economic behavior needs to be understood as a social process (see
Market as Culture). There's a lot more going on than just the market and the individual.