Abstract
This contribution develops normative arguments for the democratic and parliamentary control of the Common Security and Defence Policy (CSDP). However, on the Kantian assumption that ‘ought implies can’, it also tries to make a case for parliamentary control in the face of scepticism about parliamentary politics in general, the capacities of the European Parliament (EP) and national parliaments to exercise satisfactory levels of public control over Union decisions, and the participation of parliaments in security decisions.