This article considers the charge that citizens of developed societies are complicit in large‐scale harms, using climate destabilisation as its central example. It contends that we have yet to create a lived morality – a fabric of practices and institutions – that is adequate to our situation. As a result, we participate in systematic injustice, despite all good efforts and intentions. To make this case, the article draws on recent discussions of Kant's ethics and politics. Section 2 considers Tamar Schapiro's account of how otherwise decent actions can be corrupted by others’ betrayals, and hence fall into complicity. Section 3 turns to discussions by Christine Korsgaard and Lucy Allais, which highlight how people can be left without innocent choices if shared frameworks of interaction do not instantiate core ideals. Section 4 brings these ideas together in order to make sense of the charge of complicity in grave collective harms, and addresses some worries that the idea of unavoidable complicity may raise.