If there were a trillion planets identical to Earth in the Universe, what are the chances that one would evolve intelligent life?

A lot of people are saying that there's a very good chance due to how unlikely intelligent life is to arise since many, many factors have to be just right, however, there are also sextillions (maybe even closer to a septillion) planets in the universe, so it's very probable that at least one of those planets will also have conditions just right for intelligent life. It's kinda like rolling a 6 on a die 20 times in a row. It's extremely unlikely on your first try, but if you're given 1000000000000000000000000 (a septillion) chances, you're bound to roll a 6 20 times in a row at least once (actually about 37 million times).

Very high. Just looking at the evidence that we have accumulated over the last half century really shows that the circumstances that led to Earth being inhabited and one of it's species becoming "intelligent" is phenomenally improbable. You would be wise to consider the results of real research rather than relying on the low-brow "huge universe" banter.

Make no mistake: life in the universe is incredibly rare. We are thus alone. I'd recommend getting used to it now, and beat the herd.

Cheers!

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.