It depends how you measure wealth. If the whole world was shared by the whole human race, everyone would have the whole world as a playground. As it is you can barely take a step off the road without infringing someone's 'property rights'
With due respect, I think you're impression of what the world was like before modern conveniences is grossly misguided. You call the world a "playground"?
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There is a reason men have labored continuously over thousands of years to escape this "playground." Yet, you complain because the idea that some people own property bothers you? You'd rather just have everyone destitute, afraid, and starving... so long as everyone was equal in this misery?
Looks like playground was the wrong word. Perhaps I should have used 'common land'.
Yes, I agree we've advanced over these years, and that's good.
But now that we've escaped the starvation etc, I'm suggesting it's time to change the paradigm again. Once we've crossed the river, we don't need the boat anymore.