Why is a nuclear peace deal between the U.S. and Iran key to stability in the Middle East? What would the global consequences of a full-scale trade war between China and America be? Is the world headed towards another arms race? How should Canada respond to Trump's repeated threats of annexation? And why is liberal democracy worth defending? This is Part 2 of Steve Paikin's wide-ranging conversation with CNN's Fareed Zakaria. Fareed is also the author of "Age of Revolutions: Progress and Backlash from 1600 to the Present," and a columnist for The Washington Post. Watch Part 1 of their conversation here: https://www.youtube.com/watch?v=1QXwNq0d26USee omnystudio.com/listener for privacy information.

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