It is unlikely that we can defuse the climate time bomb, let alone other ecological threats, as long as our economy continues to grow. But what would the end of economic growth mean for geopolitics? Could a European Union that is the first to embrace post-growth still be a global actor? Would it be able to defend itself, its allies, democracy, human rights and the international rule of law, in an era when aggressive autocracies are invading or threatening their democratic neighbours? This report addresses uneasy questions that few have dared to ask as yet.