Wrong answer. The right answer was: Government. Without government you wouldn't have your property. If you don't pay taxes, you lose your property, but I'm sure you know that.
Pretending that every "exchange" is equal is bizarre. Capitalism, at its core, is based on growth. Also, just because you didn't personally kill native people does not absolve you of your situation.
Now, we need to define what we think reasonable property allocation would be before we go on. I don't think any one person should own mansions or skyscrapers or plantations, or any other luxury mega-valued property type.
As far as right of use, from each according to their ability, to each according to their needs.
RE: Anarchy Misunderstood