“…In a classical definition, 'an anti-system opposition abides by a belief system that does not share the values of political order within which it operates' (Sartori, 1976, p. 133). Drawing on this classical definition, the notion of anti-systemness was predominantly employed for the study of radical political parties in Europe, including organizations with fascist, right-wing, or left-wing agendas (see, for instance, Cappoccia, 2002;Keren, 2000;Zulianello, 2018). And yet, anti-system opposition can exist in any type of political system as genuine pro-democracy preferences constitute anti-systemic opposition in authoritarian regimes (Albrecht, 2013).…”