We humans have invested great resources and ingenuity in building the Spectacular Thermonuclear Unpredictable Population Incineration Device, (acronym S.T.U.P.I.D.), whose two adjustable knobs determine its explosive power X and the probability P that it goes off pontaneously in any given year.

Max Tegmark
I discuss the impact of computer progress on nuclear war policy, both by enabling more accurate nuclear winter simulations and by affecting the probability of war starting accidentally. I argue that from a cosmic perspective, humanity’s track record of risk mitigation is inexcusably pathetic, jeopardizing the potential for life to flourish for billions of years.
Read more at http://arxiv.org/pdf/1505.00246v1.pdf