>Very small children understand and recognize property, since it is a natural right. The toy in my hand is "mine," and when some other kid comes along and takes it, I get upset.

When a very small child in a poor family looks at what is under a wealthy family's Christmas tree he's also going to be upset. Does that make a relatively equal distribution of Christmas presents a natural right?

I see no basis for decrying all coercion and mandating transactions be voluntary yet also overlooking the biggest contributor to coercion: property.