The debate on the Left over the war in Ukraine has exposed serious disagreements on international questions, ones that have been brewing and deepening for over a decade. From 2001 to 2011, there was general unity on the socialist Left about the question of imperialism and the response to it. This was a period of explicit and obvious attacks on sovereign countries such as Afghanistan and Iraq by the United States, United Kingdom, and other imperialist forces. This naked imperialist aggression triggered global mass movements against the so-called “War on Terror.”