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John Hammond: I don't think you're giving us our due credit. Our scientists have done things which nobody's ever done before.
Dr. Ian Malcolm: Yeah, yeah, but your scientists were so preoccupied with whether or not they could that they didn't stop to think if they should.
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Imagine this were possible. You'd have just destroyed what is likely the primary reason that the past ~80 years have been this weird blip in history where there's been no major and unrestrained war between two world powers. The most obvious embodiment of this is the reason that the Cold War is now called the Cold War, and not WW3. There's also the reality that in this new WW3 which we'd near to immediately create, we'd likely see the rapid emergence of the chemical, biological, and other weapons that every major nation totally aren't developing.
Of course we do stand a good chance of destroying ourselves with nukes, but it's not entirely clear to me that we stand less of a chance of destroying ourselves without them. And adding to this equation is that if the nukes are gone on day 1, then WW3 starts on day 2.