Earlier quoted context omitted.
My point is all ownership is a legal concept. Congress can abridge many property rights, including real estate, and the only thing keeping them from going further is the custom enshrined in our Constitution.
It's more than "custom." Since we have judicial review, courts can strike down an unconstitutional taking of property. It goes back to WWKGD? ("What would King George do?") ...and doing the opposite. So we have constitutional protections against seizing private property, but arbitrary terms, except they must be limited terms, for grants of monopoly. Not perfectly observed of course. The Mouse always stretches the def…
The custom cited is the power of the Constitution. The point is all property is an invented construct.
This isn’t some neo-Marxist hot take. It’s reflecting that IP is simply a novel form of e.g. drawing lines on a map and calling them deeds. One is older and more precedented. That’s a huge advantage. But neither is more “fake” than the other.