The Laclauan definition of populism, so called after the Argentinian political theorist Ernesto Laclau who developed it, uses the term in reference to what proponents regard as an emancipatory force that is the essence of politics. In this concept of populism, it is believed to mobilise excluded sectors of society against dominant elites and changing the status quo. Laclau's initial emphasis was on class antagonisms arising between different classes, although he later altered his perspective to claim that populist discourses could arise from any part of the socio-institutional structure. For Laclau, socialism was "the highest form of populism". His understandings of the topic derived in large part from his focus on politics in Latin America. This definition is popular among critics of liberal democracy and is widely used in critical studies and in studies of West European and Latin American politics. Harry C. Boyte for example defined populism as "a politics of civic agency" which "develops the power of 'the people' to shape their destiny", as examples citing both the Russian narodniks and the South African Black Consciousness Movement.