In Critical Theory and Poststructuralism Mark Poster enacts a dialogue between the French poststructuralists, especially Michel Foucault, and the tradition of critical social theory as developed by the Frankfurt School and by other Continental theorists such as Jean-Paul Sartre. These confrontations between poststructuralists who represent "e;postmodern"e; thought and theorists committed the "e;modern"e; project of the Enlightenment is, according to Poster, of urgent importance because of the failure of critical theory to sustain a convincing critique of today's radically changed social formation.