The controversial theory linking Roe v. Wade to a massive crime drop is back in the spotlight as several states introduce abortion restrictions. Steve Levitt and John Donohue discuss their original research, the challenges to its legitimacy, and their updated analysis. Also: what this means for abortion policy, crime policy, and having intelligent conversations about contentious topics.

There is strong evidence that exercise is wildly beneficial. There is even stronger evidence that most people hate to exercise. So if a pill could mimic the effects of working out, why wouldn’t we want to take it?