William H. McNeill makes a monumental contribution to the knowledge of humanity in his book Plagues and Peoples. He looks at the history of the world from an ecological point of view. From this viewpoint the history of human civilization is greatly impacted by changing patterns of epidemic infection. Plagues and Peoples suggests that "the time scale of world history...should [be] viewed [through] the "domestication" of epidemic disease that occurred between 1300 and 1700" (page 232). "Domestication" is perceived "as a fundamental breakthrough, directly resulting from the two great transportation revolutions of that age - one by land, initiated by the Mongols, and one by sea, initiated by Europeans" (page 232). This book illustrates how man's environment and its resident diseases have controlled human migration...