Over the last twenty years, Ross B. Emmett has explored the work of Frank H. Knight, the philosopher of the Chicago School of economics. Knight occupies a paradoxical place in the history of Chicago economics: vital to the tradition's teaching of price theory and the twentieth-century re-articulation of the defense of free enterprise and liberal democracy, yet a critic (in advance) of the empirical and methodological orientation that has characterized Chicago economics and the rest of the discipline in the post-war period, and skeptical of liberalism's prospects. In the course of his...