In 1975 there were 125 wineries in eastern North America. By 2013 there were more than 2,400. How and why the eastern United States and Canada became a major wine region of the world is the subject of this history. Unlike winemakers in California with its Mediterranean climate, the pioneers who founded the industry after Prohibition 1933 in the United States and 1927 in Ontario had to overcome natural obstacles such as subzero cold in winter and high humidity in the summer that favored diseases devastating to grapevines. Enologists and viticulturists at Eastern research stations began to...