When policy-makers opt for sanctions or other economic power instruments in response to geostrategic challenges, the stage is set for geoeconomic diplomacy. Challenging traditional conceptions about the interplay between governments and markets, this book sheds a new light on the diplomatic actors and processes that shape successful geoeconomic foreign and security policy-making. Unpacking the ‘networked practices’ through which diplomats advanced the early implementation of the European Union’s far-reaching sanctions regimes against Russia and Syria, the book demonstrates how geoeconomic diplomats depend on their abilities to navigate in complex actor-networks in the interfaces between the public, private, and non-governmental realm.