The important role in world affairs played by Spain during the period from the fifteenth century through the nineteenth contrasts sharply with the utter neglect of the writings and theories of great Spanish scholars by those who have written about the development of social thought in western civilization. Almost never has the present writer seen a reference to the work of any Spaniard by those who have prepared the compendia dealing with the history of social and sociological theories which are in general use as texts and references in colleges and universities throughout the United States and Canada. This neglect seems to be paralleled in the writings of most European sociologists; and even in Latin America there appears to be little familiarity with the work of important Spanish social thinkers, exception made of the comparatively recent writings of José Ortega y Gasset.