Taken quite literally, property is armed theft from the commons I guess. Unfortunately, it's tricky to do otherwise in a loosely organized swarm of barely tribal actors, because any peaceful society based on shared ownership will be prone to exploitation by malicious actors. It's basically a very large prisoner's dilemma: the global optimum would be to abolish private property, but as long as there are (enough) people around to exploit the situation for their own benefit (and to the massive detriment of everyone else), we have to stick to a sub-optimal system where everyone is worse off than the optimum.