Today, Hirschman and the field he invented, known as ‘geo-economics,’ have re-emerged with a vengeance, building on his seminal ideas. These start with his ‘influence effect,’ which showed how a dominant state could structure its trade so that disruptions hurt its partners more than itself. By threatening to withhold exports or market access, this dominant state could then coerce and extract concessions from its partners. In the last year, we have seen multiple instances of US President Donald Trump using tariffs and export controls to coerce countries to invest in the United States or grant US firms favoured market access....