Frank H. Knight (1885-1972) was a central figure--many say the dominant influence--in the development of the "Chicago School of Economics" at the University of Chicago in the 1930s and 1940s, where he taught future Nobel laureates Milton Friedman, James Buchanan, George Stigler, and many other notable scholars. It was Knight's embedded skepticism about the reach of economic knowledge that set the stage for the laissez-faire economics that matured...