Radical democracy informs contemporary social movements both as critique of existing liberal democratic social orders and as inspiration for collective action to challenge power structures. However, existing approaches on the relationship between radical democracy and social movements often truncate complex socio-political issues, constraining political imagination and stifling 'truly radical' alternatives. This Element offers an analysis of contemporary social movements in Colombia and Turkey to show the limits and potential of radical democracy to reimagine new expressions of citizenship and non-capitalist alternatives. It argues that there is a mismatch between the radical democratic paradigm as it is formulated within Eurocentric purview, and the ways it has been articulated and practised by anti-austerity and pro-democracy movements of the twenty-first century. We propose that radical democracy should be rethought in light of novel forms of political activism and visions emerging from these social movements as a response to the failures of liberal democracy.