Maybe all these other planets have leftist governments, who say it wouldn't be fair for anyone to go to another planet until everyone could.
Maybe all these other planets have leftist governments, who say it wouldn't be fair for anyone to go to another planet until everyone could. Yup. Here's a theory for you: any sufficiently advanced civilization will eventually spawn liberal infestations, who will likely succeed in dragging the civilization back down the ladder of progress. :)