Your quote was the final thing I said, and everything I said before is what made me say that. We're in a situation where we're a tumor growing on Earth. and we

Your quote was the final thing I said, and everything I said before is what made me say that. We're in a situation where we're a tumor growing on Earth. and we see our growth threatens Earth, so the solution is "we need to spread around so we can keep growing even more". An alternative solution is to control our growth (which doesn't only concern biological reproduction but also economical). Which will give us practically infinite time. Technically the notion that "we" (homo sapiens) can spread to other planets is nonsense. Whatever we spread to other planets, if anything, won't be human, one way or another. Because a human is bound to its environment.