Once a quixotic slogan, the idea of actually dismantling every nuclear weapon is attracting mainstream policy thinkers.
For many Americans, the idea of a world without nuclear weapons is a bit like the idea of a world without war or disease - it would be nice, but, contra John Lennon, it's hard to imagine.
That's not to say lots of people haven't devoted themselves to the cause. As the atomic age was dawning, Gandhi was already demanding its end, and today Pope Benedict…
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