We call it a thing, space. Star Trek called Space it the final frontier. The conquerors of the Americas claimed land, planted homes and flags saying this was theirs, and they owned the land.
Space is not so easily defined. How do you decide how close to stand to someone? Are you in their space? Every culture has their own comfort level. And in each culture there are a differences. Children and parents can hug and snuggle each other without discomfort but you wouldn’t walk up to a stranger and act the same way. Not unless you don’t mind being slugged.