Résumé : Much has been written over the past decade about the rise and success of far-right parties as key actors of dissensus over liberal democracy. Less attention, however, has been devoted to similar transformations taking place within civil society. This article examines the role played by think tanks in Poland and Hungary in building a new illiberal field. Drawing on Gramsci’s concept of cultural hegemony and Bourdieu’s notion of cultural capital, we theorize four core functions performed by illiberal think tanks: mediating, building, disseminating, and legitimizing this emerging field. Using Twitter data, we analyze how these illiberal think tanks operate as crucial nodes in connecting national, European, and American intellectuals and actors. Through their work and accumulation of cultural and academic capital, they contribute to fostering dissensus over liberal democracy in Central and Eastern Europe and beyond.