You really think the probability of such a disaster is 0.000001% per year? The cold war wasn't that long ago and came very close to the brink a number of times.

You really think the probability of such a disaster is 0.000001% per year? The cold war wasn't that long ago and came very close to the brink a number of times. If we were just lucky, and there is an expected rate of 1 nuclear war every 73 years, that already gets us over your 1% threshold. And nuclear war is far from the only risk. Nuclear weapons are already 70 year old tech, we are always progressing towards scarier technologies. I think your estimate is off by a factor of a million.