Where does our sense of right and wrong come from?

We watch chimps at a primate research center sharing blackberries, observe 3-year-olds fighting over toys, and tour Eastern State Penitentiary -- the country's first penitentiary. Plus, a story of land grabbing, indentured servitude, and slumlording in the fourth grade.

UPDATE: Jad is now a father! If you'd like to know how becoming a parent did or did not change his answer to the thought experiment in the first half of this episode, check out what he has to say, here.