Journalist and author Fareed Zakaria hosts this in-depth look at the major global developments of the week (the title's ``GPS'' stands for ``Global Public Square''), with an emphasis on new ideas and innovative solutions to the world's toughest problems. Each episode also features Zakaria leading a panel discussion and interviewing a major world figure.Fareed is joined by former Polish Foreign and National Defense Minister Radosław Sikorski and Charles Kupchan, who served as senior director for European affairs in President Barack Obama's National Security Council, to discuss if NATO enlargement prompted Putin to invade Ukraine and whether further enlargement - namely Finland and Sweden - will enflame him further. Then, the mass shooting in Buffalo, NY, has called attention to the racist and false "great replacement" conspiracy theory. Fareed talks to The Washington Post's Ishaan Tharoor and American University extremism expert Cynthia Miller-Idriss about the roots behind the hateful theory and how it is spreading around the world.