With Donald Trump back in the White House, tariffs have become front-page news, and advocates for free trade find themselves on the back foot. Soumaya Keynes and Chad P. Bown argue that with great powers now using trade as a weapon, there can be no simple return to the settled order of rules-based global trade that dominated the late twentieth century. Their new book, 'How to Win a Trade War', provides a tour through the toolkit of the trade warrior.

They join Marc Sidwell to discuss the new world of economic conflict, why tariffs are like a party drug – and how trade wars can still spiral out of control.

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