> I mean this seems to disregard our entire history as a species. There have always been "others" within a population that seek, above anything else, to find a

> I mean this seems to disregard our entire history as a species. There have always been "others" within a population that seek, above anything else, to find a new place to go in order to live life they way they want to. If the energy and time requirements are great enough, space between solar systems will work as the same sort of barrier space does for the rest of life on Earth.