Draper's History of the Intellectual Development of Europe in 2 volumes is a book based on an original and challenging idea of applying the methods of physical science to history. The author has undertaken the labor of arranging the evidence offered by the intellectual history of Europe in accordance with physiological principles, so as to illustrate the orderly progress of civilization, or collected the facts furnished by other branches of science with a view of enabling us to recognize clearly the conditions under which that progress takes place. Seen thus through the medium of physiology,...