Abstract
While constitutionalism is generally reduced to the idea of limited government, little has been said to its contribution to the juridification of the social sphere. The article shows the significance of constitutionalism for the institutionalization of modern civil societies. Modern civil societies, it is argued, can only flourish in a form of modern state that has undergone a process of internal differentiation in the direction of a separation of powers. Through the analysis of the process of self‐constitution of Argentine civil society, I show how the erosion of the constitutional components of the state by populist democratizing movements resulted in the disintegration of civil society.