The challenges facing the world today, from conflict in Ukraine to climate catastrophes across the globe, cannot be solved by one country alone. The need for multilateral solutions between nations, even between warring nations, has never been greater. And yet, as diplomats, ministers and heads of state converge on the United Nations in New York this week for the 78th annual UN General Assembly, the UN Secretary-General fears that we are entering a time of increased global fragmentation.   "We really need stronger and reformed multilateral institutions to be able to coordinate on what is becoming a multipolar world," Secretary-General António Guterres tells Ian Bremmer in an exclusive interview for the GZERO World podcast. "I would remind you that Europe, before the First World War, was multipolar. But because there were no multilateral governance institutions at the European level, the result was the First World War."   Whether it’s the costly war in Ukraine, lurching towards its third year, or the ongoing climate crisis that, in Guterres’ words is quote “boiling” the planet, the Secretary-General and Ian discuss a wide array of pressing global issues. And don’t forget our brave new world of artificial intelligence, which will need a new global regulatory framework of its own.