Does "natural selection" apply extra-galactically? Would the rules of natural selection (in this Universe, but possibly in a different galaxy) still apply? In that regard, how might they differ? Basically what I'm driving at is, if we were to encounter life outside Earth who popped in extragalactically, would they of necessity be either: seemingly infinitely repressive (and thus able to "force march" the development of tech more quickly) or seemingly infinitely pacific (and thus able to work together to develop tech more quickly)? The question is not which one is likely, but if the galactic natural selection would result in either/or possibilities of their nature along these lines. If "intelligence" is effectively derived from propogation due in large part to both luck and an developed ability to understand world around us, wouldn't natural selection still apply? Forgive me if this is not the correct forum, but I am trying to approach this question from a scientific angle.