In Political Liberalism, J. Rawls describes a meta-ethical procedure — political constructivism — whereby political theorists formulate political principles by assembling and reworking ideas from the public political culture. To many of his moral realist and moral constructivist critics, Rawls's procedure is simply a recent version of the “popular moral philosophy” that Kant excoriates in the Groundwork for the Metaphysics of Morals. I defend the idea of political constructivism on philosophical and political grounds. I argue that political constructivism is the (...) best available methodology for self-legislating, socially embedded and fallible human beings; then I show that political constructivism may produce principles that could garner the principled assent of Euro-American Muslims such as Taha Jabir Al-Alwani. The article considers how political constructivism might be employed to formulate new political principles for Euro-American societies experiencing and confronting the Islamic revival. [R]. (shrink)