I think that achieving space colonization will only happen if we bring this world to the brink of destruction and the 5 people with all the money at that time decide to spend it all to escape. If we do achieve harmony it’ll be after those guys have already left to go destroy another world, and those left behind who survive the millennia of desolation as the world falls apart and puts itself back together again finally get the picture and treat their home with respect. And even then all it’ll take is one self-centered, power-hungry person being born for the exploitation to come back again.