Political realism is characterised by fidelity to the facts of politics and a refusal to derive political judgments from pre- political moral commitments. Even when they are not taken to make normative theorising impossible or futile, those characteristics are often thought to engender a conservative slant, or at least a tendency to prefer incremental reformism to radicalism. I resist those claims by distinguishing between three variants of realism—ordorealism, contextual realism, and radical realism—and contrasting them with both non-ideal theory and utopianism. (...) I then develop a version of radical realism as a form of debunking and vindicatory genealogy. Even though this new approach eschews both feasibility constraints (unlike non-ideal theory) and prescriptions about the ideal society (unlike utopianism), I show how it has more radical potential than morality-driven (and hence often ideological) political theory, and how it supports both open-ended, radical social critique and concrete forms of prefigurative political action. (shrink)