What drives the best and worst of human nature? We’ll discuss probable causes of our triumphs and failures this hour with Malcolm Potts, Professor and Chair of the Bixby Center for Population, Health & Sustainability at the University of California, Berkeley and co-author of the book “Sex and War: How Biology Explains Warfare and Terrorism and Offers a Path to a Safer World” (BenBella Books, 2010). Potts will address the World Affairs Council of Dallas Fort Worth this evening.