For centuries the human race has been grappling with how to live a moral life. In this conversation we hear from scholars who think deeply about moral philosophy and helping others. David Brooks suggests that, “We have words and emotional instincts about what feels right and wrong,” yet questions the criteria we use to “help us think, argue, and decide.” New Yorker author Larissa MacFarquhar profiles a number of do-gooders whose deep, even extreme moral commitment leads as frequently to criticism as to admiration. Columbia philosophy professor Michele Moody-Adams believes that we find our best selves through serious self-examination and constant scrutiny. And Stanford political philosopher Rob Reich engages us all in deep exploration of these questions.