Walls throughout History: An Interview with Professor David Frye

What creates civilization, in the most basic sense? According to Professor David Frye, who joins me this week, it's walls - Hadrian's Wall, the Great Wall of China, city walls, and thousands more over the millennia. Support this show by supporting our sponsors! See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .