I find A. Sen, and the welfare economics movement quite an interesting one, regardless of whether I, or you, agree with capitalism.

It breaks down and reinvents neoclassical economic ideals with a more holistic understanding of social concerns. Some psychological concepts used to disregard the “homo economicus” (the perfectly knowledgeable, rational man) include risk avoidance, and irrationality.

Nudge theory has been beneficial for many causes. For example, simply altering the date at which you provide aid to a farmer will alter outcomes; changing organ donations from opt-out to opt-in greatly increases donors; adapting the structure of auctions can remove most collusion; the list goes on. The study of un-rigging markets can be dope, even if limited in its scope.