This article elaborates an account of political theology that is both historical and critical in orientation. Whereas the historical dimension excavates theological antecedents that inform the vocabulary of international relations, the critical dimension illuminates incoherence in accepted ways of thinking and speaking about the subject. The article develops these distinct, though complementary, modes of argument to illustrate what political theology contributes to the study of international relations. Part one situates the historical mode within the broader discourse of political theology, followed in part two by a consideration of the marginal place of political theology in international relations scholarship. Part three re-reads the exception—extraordinary action that contravenes established legal or moral order—to illustrate what is at stake when analogies between divine and human deviate from the theological original. This, in turn, unlocks in part four a critical project that subverts the ubiquitous contrast between irrational (religious) belief and rational (secular) unbelief and the privilege it asserts. Political theology conceived along these lines breaks free of the parochialism of the present by denaturalizing a matrix of international relations knowledge that is anything but natural.