Why is warp travel one of the gold standards of entry into the Federation? What if that said planet was a warmongering species that just lived to kill and they had just discovered warp travel on top of whatever space capability they had, would the Federation still notice them? Actually on that it's a thing that really bugs me with Star Trek that they always look for that before considering the other aspects of a planet and if they haven't got that they don't even bother with them, or just study them hoping one day they'll advance to the required level of tech to gain Federation entry. I don't know which series this was but I remember one of the series, could have been TNG or Voyager but they found a planet that had learnt how to use anti matter but hadn't yet learn't how to use warp travel, they had a few satellites in orbit of their world but their spaceflight capabilities were limited to things around their planet. Just that bugs me in that harnessing anti matter is no small thing and if you are able to harness that to make power why couldn't you be part of the Federation? It just bugs me that everyone harps on about "warp travel." As a counter to that what if worlds DO know about other worlds and alien life through observation of the universe, and sending out probes or other items, but they just haven't reached that level of technology to actually make the trip beyond their own solar system yet. Would they be shunned? I feel this is unfair, surely some kind of provisional membership could be allowed surely? I mean if you have managed to fill your home solar system with people but the limit stopping you from going beyond is tech why shun your world?