Abstract
Politics, in an emphatic sense of the term, involves questioning, a sense of importance, rationality and a collective investment in political life. The essay discusses some of the threats against the political imaginary thus understood in contemporary Western societies. Depoliticizing trends are found in political and economic theory and echoed in discussions about political problems of global complexity. The responses to the experiences of political powerlessness include the rise of right wing populism and extremism. To analyse these currents, the essay discusses a notion of Cornelius Castoriadis that has been little developed in political theory: the distinction between validity de facto and validity de jure. It is argued that the category of validity de jure can put into philosophical relief the problems of depoliticization and the sliding scale from populism to terrorism. An increased awareness of the question of validity can further develop a reflexive understanding of distinctions between what is and what ought to be, and thus, to the importance of practicing politcs