Last month we were joined onstage by the University of Columbia economics professor Jeffrey Sachs, as he laid out his radical new vision for U.S. foreign policy. Instead of a world where America reigns as the sole superpower, Sachs argued for a new international system of equals, where America shares power and collaborates with former geopolitical rivals to solve today’s global crises. Sachs was in conversation with the BBC’s Chief International Correspondent Lyse Doucet.  Support this show http://supporter.acast.com/intelligencesquared. See acast.com/privacy for privacy and opt-out information. Learn more about your ad choices. Visit podcastchoices.com/adchoices