Critical theory explained and espoused Simpson ably introduces critical social theory, the German-born intellectual movement that has spawned sharp criticisms of modernity, its use of reason, and our highly technological, bureaucratic culture. Part 1 recounts the emergence of critical social theory within the Frankfurt School of Social Research and the theological stirrings that the Frankfurt project sparked, especially in Paul Tillich. Part 2 explores J rgen Habermas' reconception and expansion of critical social theory, especially his ideas about hermeneutics, praxis, communicative action, and civil society as the locus of prophetic social movements. Finally, in Part 3 Simpson shows how Christian theology employs critical social theory for the tasks of prophetic reason in a global civil society. Simpson's work is at once a programmatic introduction and a creative theological proposal for public theology.