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.Defense Secretary Mattis resigns after a struggle over Syria. Richard Haass & Fareed break down the President's drive to withdraw U.S. troops from Syria and decrease troop levels in Afghanistan. Then, do we focus too much on the negative? Or is the world really that scary? A debate between Niall Ferguson and Steven Pinker. Guests: Richard Haass, Niall Ferguson, Steven Pinker, and Greta Thunberg.