The problem of superstition and the divorce of political theory from social science -- The deeper sources of the breakup: the rise of "naturalism" in philosophy, social science, and politics -- The first British new left's rebellion against naturalism -- Analytic philosophy as a weapon for attacking naturalism -- Inspiring a new social science: Aristotle and Heidegger -- Overcoming value-neutrality in the social sciences -- The great reunification: an antinaturalist social science -- Future projects and a renewed humanism.