In this book two prominent philosophers bring these disagreements into focus around a set of familiar philosophical issues concerning reason and the rational subject, truth and representation, knowledge and objectivity, identity and difference, relativism and universalism, the right and the good. But these "perennial problems" are resituated within the context of critical theory as it has developed from the work of the Frankfurt School in the 1930's and 1940's to the multiplicity of contemporary approaches: genealogical, hermeneutic, neopragmatist, deconstructive, and reconstructive.