In Conscience, neurophilosopher Patricia Churchland makes the case that morality is rooted in biology; specifically, in how the brain has evolved to support and reinforce useful norms of behavior that help sustain a successful community. Discussing neurochemicals and brain regions, and everything from political views to prairie voles, Churchland sheds light on how our values are shaped in our brains. It’s a fascinating—though not uncontroversial—perspective.