Radical democracy as an ideology was articulated by Ernesto Laclau and Chantal Mouffe in their book Hegemony and Socialist Strategy: Towards a Radical Democratic Politics, written in 1985. They argue that social movements which attempt to create social and political change need a strategy which challenges neoliberal and neoconservative concepts of democracy. This strategy is to expand the liberal definition of democracy, based on freedom and equality, to include difference.

"Radical democracy" means "the root of democracy." Laclau and Mouffe claim that liberal democracy and deliberative democracy, in their attempts to build consensus, oppress differing opinions, races, classes, genders, and worldviews. In the world, in a country, and in a social movement there are many (a plurality of) differences which resist consensus. Radical democracy is not only accepting of difference, dissent and antagonisms, but is dependent on it. Laclau and Mouffe argue based on the assumption that there are oppressive power relations that exist in society and that those oppressive relations should be made visible, re-negotiated and altered. By building democracy around difference and dissent, oppressive relations of power that exist in society are able to come to the forefront so that they can be challenged.

Todd May (1955, New York) is a political philosopher notable for his role in developing, alongside Saul Newman and Lewis Call, the theory of post-structuralist anarchism. He is currently Class of 1941 Memorial Professor of Philosophy at Clemson University and contributes to CounterPunch. His 1994 book The Political Philosophy of Poststructuralist Anarchism was the first to combine poststructuralist and anarchist thought, and he subsequently has published treatments of major poststructuralist philosophers, including Gilles Deleuze and Michel Foucault. He serves as faculty adviser for several student-run political organizations.