It is a remarkable fact that, in a history extending over nearly twenty-five hundred years, a considerable part of the most significant writing on political philosophy was done in two periods of only about fifty years each and in two places of quite restricted area. ... The Second place was England, and the period was the half century between 1640 and 1690, which produced the works of Hobbes and Locke, together with the works of a host of lesser figures. George Sabine, "What is a Political Theory?"