PROLOGUEBack to the Future

Turning and turning in the widening gyreThe falcon cannot hear the falconer;Things fall apart; the centre cannot hold;Mere anarchy is loosed upon the world,The blood-dimmed tide is loosed, and everywherethe ceremony of innocence is drowned;The best lack all conviction, while the worstAre full of passionate intensity.—WILLIAM BUTLER YEATS

HOW CLOSE WE CAME TO EXTINCTION!—and it is forgotten now. In Hiroshima and Nagasaki more than a hundred thousand human beings were killed in a split second, yet the devastation led not to a halt but to a nuclear arms race. Within a few decades, two superpowers, the United States and the Soviet Union, had amassed a nuclear arsenal equivalent to four tons of dynamite for every man, ...

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