L udwig von Mises observed, "It is customary to trace the influence that the milieu exerted upon the achievements of genius" (1969, p. 9). He goes on to suggest that, whatever the general merit of the custom, it is unsound when applied to the great thinkers of Austria. Not heeding Mises' warning, eminent philosopher and historian of science Stephen Toulmin, along with his coauthor Allan Janik, ...