Few topics inspire more anxiety, anger, and confusion than sex differences between men and women. If you believe in evolution, you believe that sex differences between men and women are real and persistent. If you believe in libertarian values of individualism and freedom, you want everyone to be treated equally under the law, in the workplace, and in social settings.

On today's Reason Podcast, Nick Gillespie talks with Christina Hoff Sommers and Debra Soh about our constantly evolving understanding of gender roles, how biology and culture shape our expectations, the successes and excesses of contemporary feminism, what today's sexism looks like, and how best to measure progress. Both were in New York to speak at a panel titled "Who's Afraid of Sex Differences?" organized by the Independent Women's Forum.

Sommers is a resident scholar at Washington, D.C.'s American Enterprise Institute, the author of such well-known books as Who Stole Feminism and The War Against Boys, and co-host (with Danielle Crittenden) of the Femsplainers podcast. Soh is a Toronto-based psychologist who writes frequently on gender and science issues for The Globe and Mail and Playboy, and co-hosts (with Jonathan Kay) a podcast called Wrongspeak for the website Quillette.