Today Tehran, Tomorrow the World

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That will present the world with two futures. The first is Feynman's vision of human destruction on a scale never seen. The second, perhaps after one or two cities are lost with millions killed in a single day, is a radical abolition of liberal democracy as the species tries to maintain itself by reverting to strict authoritarianism--a self-imposed expulsion from the Eden of post-Enlightenment freedom.

Can there be a third future? That will depend on whether we succeed in holding proliferation at bay. Iran is the test case. It is the most dangerous political entity on the planet, and yet the world response has been catastrophically slow and reluctant. Years of knowingly useless negotiations, followed by hesitant international resolutions, have brought us to only the most tentative of steps--referral to a Security Council that lacks unity and resolve. Iran knows this and therefore defiantly and openly resumes its headlong march to nuclear status. If we fail to prevent an Iranian regime run by apocalyptic fanatics from going nuclear, we will have reached a point of no return. It is not just that Iran might be the source of a great conflagration but that we will have demonstrated to the world that for those similarly inclined there is no serious impediment.

Our planet is 4,500,000,000 years old, and we've had nukes for exactly 61. No one knows the precise prospects for human extinction, but Feynman was a mathematical genius who knew how to calculate odds. If he were to watch us today about to let loose the agents of extinction, he'd call a halt to all bridge building.