This article engages with a discourse emerging from international political theory, international law and political science on awarding privileges to democracies in crucial issues of global governance. Proposals that a ‘Concert of Democracies’ should be legally entitled to take decisions in case the United Nations Security Council is unable or unwilling to act are amongst the most prominent expression of this vision of the stratification of the international society into first-class and second-class regimes. The article reconstructs central tenets of this discourse on the inclusion and exclusion of regime types and shows that this kind of differentiation of states has been very much inspired by readings and appropriations of ‘democratic peace’ scholarship in International Relations. The article critiques the underlying problematic theoretical assumptions and the practical implications of democratic peace theory and policy proposals inferred from it.