This is a useful rule of thumb. Lets try stretching it: Humans havent destroyed the world in their 300,000 years of existence, so probability of them destroyin

This is a useful rule of thumb. Lets try stretching it: Humans havent destroyed the world in their 300,000 years of existence, so probability of them destroying the planet in future is less than 0.00001 (1 in 100,000). I feel like that might be an underestimate. Reminds me of the Doomsday Argument https://en.wikipedia.org/wiki/Doomsday_argument https://en.wikipedia.org/wiki/Doomsday_argument