[afandian]

I'm not sure about "most developed countries" but there is still very strong memory of past violence in Great Britain. Some of the tail end of it still bubbling.

On another tack, there are plenty of homeless people in the UK. Can you imagine what would happen to them if they broke into expensive uninhabited properties in London? There would be violence.

I have no idea of alternatives, I was just pointing out the origin of a lot of current land ownership.