Seriously, folks, why are we so eager to spread our dysfunction? Until we can manage the basics of sanity here on Earth, we have no business spreading to the stars. I'm not even talking about an idealised society of some kind; I'm just suggesting basic stability, justice and social order. Two thirds of the globe live in grinding misery,most of which is entirely preventable. I'd even go so far as to say that 85% of human misery is self-inflicted; the remainder is inherent in the human condition.
By any reasonable metric, social science has fallen abjectly behind "hard" science. In my view, this is because of the primacy of subjectivism and relativism in the humanities, but I'm certainly open to other explanations. I'm not opposed to space travel, even interstellar travel, which is almost entirely wishful thinking by the innumerate, I just think we should put our own house in order before we trash our neighbour's place.