This last point refers to the concept of a "radical public sphere" where voice in the political debate is given to otherwise oppressed or marginalized groups. Approached from the radical democracy theory, the expression of such views on the internet can be understood as online activism. In current liberal representative democracies, certain voices and interests are always favoured above others. Through online activism, excluded opinions and views can still be articulated. In this way, activists contribute to the ideal of a heterogeneity of positions. However, the digital age does not necessarily contribute to the notion of radical democracy. Social media platforms possess the opportunity of shutting down certain, often radical, voices. This is counterproductive to radical democracy