The world has changed irrevocably in the last century. Fifty years ago, it looked completely different; and the way the world looked to the great thinkers of the time still holds surprises. J. Robert Oppenheimer helped to invent the bomb that was dropped on Nagasaki and Hiroshima, which ultimately changed international politics forever. Northrop Frye took a new and challenging look at Canada in the changing international world. And Edward...