 But questions about the boundaries between the domestic and the international legal sphere, and their respective institutions, are even more important nowadays as international organizations exercise functions that once were within the exclusive domain of states. These questions lie at the heart of the most recent debates about international law, populism (Müller 2016; Alston 2017) and the rise of authoritarian international law (Ginsburg 2020). Some question the dualism or pluralism on which these arguments are premised, and prefer to think of domestic and international law as forming part of the same legal order. Kelsen was the most famous proponent of these “monist” conceptions (Bernstorff 2010; for another attempt to show the compatibility of state sovereignty with the authority of international law with the notion of changing sovereignty regimes and constitutional pluralism, see Jean Cohen 2010).