There’s a non-trivial chance that we will never come together, even on a millennial time scale
If you really believe that, then why do you think we deserve to infest the rest of the galaxy? We'd be planet killers, bringing death and mayhem wherever we god. Intelligent life would be wise to put us out of their misery before we pop our landers.
I believe our problems are solvable, because our problems all seem to boil back to the same tiny group of people fucking things up for everyone... And some of that group are the people privatizing space.