The answer is the Turks and Israelis. Any other answer ignores reality. Any philosophy that says otherwise is better suited to castles in the sky than the world we live in. I personally find the reality very ugly and have had heated discussions with Turks on the value of restitution and reconciliation. I've been about the lake Van and Rize areas; its pretty clear who owns what and any effort to make the world a better place must start with the reality of where we are now.
In ethical terms we are evolving. Those who owned slaves were not evil brutes any more than woman who has an abortion is an evil brute. Today we see slavery as wrong and abortion as tolerable. If we were having this conversation 1000 years ago, the situation would be exactly reversed. Thats precisely why I object to people saying intellectual property is illegitimate. It implies there is some kind of eternal ethical standard and that they are on the right side of it and that those who happen to like the benefits on intellectual property are moral pygmies. When if fact, they simply find it ugly and would do better to communicate a better alternative.
I think I comprehend you a little better now, but you don't seem to understand the is-ought problem or the consequences of your position. If property begins and ends with simply "that under one's control", then how can disputes be resolved? "The guy down the street may say that car is his, but my guns make me the strongest power in the realm. Hand over the keys!"
I'm not saying that those who owned slaves were evil, just that I'm not willing to
advocate a system in which people can become slaves at the whim of the powerful.
And if you start with the principle that possessions
ought to be acquired only by homesteading or voluntary transfer, then you must logically reject the concept of Intellectual Property. Either you accept the starting principle, or you accept a different principle, or you are truly neutral on the means through which possessions ought to be acquired (i.e., trade/theft = po-tay-to/po-tah-to). Which is it?