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.
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<p>UCLA environmental historian Jon Christensen discusses Los Angeles, its never-quenched thirst for water, and what that means for the future.</p><p><br></p><p>Support us by supporting our sponsors!</p><p>See Privacy Policy at <a href="https://art19.com/privacy" rel="noopener no ... Show More
<p>American History Tellers. Our History, Your Story. Premieres January 3rd.</p><p>See Privacy Policy at <a href="https://art19.com/privacy" rel="noopener noreferrer" target="_blank">https://art19.com/privacy</a> and California Privacy Notice at <a href="https://art19.com/privac ... Show More