By Ross Andersen
Unthinkable as it may be, humanity, every last person, could someday be wiped from the face of the Earth. We have learned to worry about asteroids and super volcanoes, but the more-likely scenario, according to Nick Bostrom, a professor of philosophy at Oxford, is that we humans will destroy ourselves.
In the longer run, I think artificial intelligence ~ once it gains human and then superhuman capabilities ~ will present us with a major risk area. There are also different kinds of population control that worry me, things like surveillance and psychological manipulation pharmaceuticals.
1) Almost all civilizations like ours go extinct before reaching technological maturity.2) Almost all technologically mature civilizations lose interest in creating ancestor simulations: computer simulations detailed enough that the simulated minds within them would be conscious.3) We're almost certainly living in a computer simulation.