That's a good point, and one I often wonder about too. Maybe advanced civilizations are not expansionist. However it doesn't make a good solution to Fermi's Par

That's a good point, and one I often wonder about too. Maybe advanced civilizations are not expansionist. However it doesn't make a good solution to Fermi's Paradox because all civilizations would have to not be expansionist, if there were just a few exceptions they'd expand all over and we'd likely spot them.