Arnold Toynbee was one of the most remarkable thinkers of the 20th century, a man of far-reaching imagination, extraordinary erudition, and an infinite capacity for hard work. At the height of his fame, he was the most renowned scholar in the world, acclaimed as the author of the monumental, 10-volume A Study of History. Indeed, such was the regard for his Study that Time magazine, in a cover article on Toynbee published in 1947, declared that he...