The world’s largest multilateral organization was born out of the global crisis of World War II. Now, as another crisis rocks the world, the United Nations is facing a challenge of its own—to remain relevant in an increasingly nationalistic geopolitical environment. On the eve of the first Virtual UN General Assembly,  Ian Bremmer spoke to UN Secretary-General António Guterres about pandemic response, climate action, the US/China schism, and more on the GZERO World podcast.