ionalist ambitions, but what those ambitions should be and how to rethink them in the 21st century remain open questions. Before his tragic passing in 2020, Michael Brooks talked about a new kind of cosmopolitan socialism that would be appropriate for our time. A How To Guide To Cosmopolitan Socialism builds upon Brooks' vision to argue that we need a left which knows no boundaries and recognizes the fundamental moral equality of all individuals on the planet while securing the material conditions for their flourishing. Only such a sweeping vision can successfully combat the forces of reaction and violence confronting us today.