The uneven and combined development (U&CD) approach in International Relations (IR) claims to offer a solution to the question of “the international” with a single, coherent theory capable of uniting both sociological and geopolitical factors in the explanation of social change. The approach thus claims to provide what IR theorists have long been searching for: a social theory of the international. While acknowledging the importance of this research programme to the field of IR scholarship, this article argues that the U&CD approach takes for granted what needs to be theorised, failing to provide the theoretical solution to the “domestic analogy” problem it so powerfully identifies.