Universal property is a universal birthright to an equal share of co-inherited wealth, along with a duty to preserve that wealth for future generations. It is a complement to private property, not a replacement. Its purpose is to represent in real-time markets the interests of future generations, nature and all living persons jointly.
We need universal property because markets today are grievously out of balance. They consistently over-reward a small minority of property owners at the expense of the majority of humans and nature. Universal property would correct that imbalance and transform the way markets behave.