As Donald Trump declares a trade war on the rest of the world, it’s time to learn about a field of economic research known as “weaponised interdependence”. The bad news is that the US president’s weapon of choice – imposing tariffs on goods imports – is a fairly outdated tool of economic warfare. Globalisation and advances in financial and communications technology have created an arsenal of additional weapons, which may yet be fired off by the US or by other big players such as China and the EU. To find out more, the FT’s Alan Beattie speaks to the leading world expert on weaponised interdependence, Abraham Newman, professor of political science at Georgetown University, and co-author with Henry Farrell of 'Underground Empire: How America Weaponized the World Economy.' Newman warns that Europe, in particular, needs to completely change its gameplan in response to this new world of dominance relationships.

Presented by Alan Beattie. Produced by Mischa Frankl-Duval and Laurence Knight. Manuela Saragosa is the executive producer. Original music by Breen Turner. Audio mix by Simon Panayi. The FT’s head of audio is Cheryl Brumley.

Read a transcript of this episode on FT.com

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