Henry George talks about "fixed supply" and a lot of his language speaks to the conomic ideas of the time. Remember that the liberal philosophy of property rights was all about adding your own labour to establish value and property rights.
But... We've moved on from those things.
We both said the same thing, just using different words. But... Using simple, modern economic explanations makes it a lot easier to follow.
I think people get totally lost unless they understand (in modern, marginalist microeconomic terms) why (a) rent does not change (b) the value of land becomes near-zero (c) what "land value" attempts to describe.
Meanwhile, the part of this that inevitably dominates the politics and decision making is this: (x) land loses all it's value and real estate investing no longer yields capital gains (y) Homeownership is no longer a safe haven. Owner-occupiers becomes exposed to future housing costs, just like renters.
These are two major changes, and Georgism and needs to own them (imo) to maintain coherence. There's no room for confusion here.
>It never falls to zero, of course, even at a one million percent tax rate the land has some positive value
No. The land can have negative value, if the tax is too high. This is the kind of confusion I'm talking about... and where georgism gets genuinely confusing.
The "land value" in Geogist land-value-tax.. is not market price. It is whatever the land price would be.. in a market without property taxes. It is a theoretical price. The tax rate is applied to the theoretical price. That is LVT.
The whole business with theoretical prices is why Georgism was dismissed as a form of communism. Soviet economics was developing similar concepts in the 60s-90s. Eg linear programming.
In all honesty, I don't think this is all that important. Irl georgist policies would have to make do with an innacurate estimate of LVT, erring on the side of low taxe rates relative to "real/theoretical" LVT. They could even abandon the concept entirely, and go with a more tangible proxy.
But... long before you get to that point, you have to contend with the losers of this paradigm shift. (1) Anyone holding valuable real estate loses. Both homeowners and investors. That is a lot of private wealth disappearing (2)Then, the economic safety of home ownership disappears. You can no longer buy to lock in a price and guarantee yourself housing forever.
It's important to remember that in most periods, Georgists like georgism because it is a better tax system. It's not really a solution to housing availability or affordability... not directly.
There are interesting discussions to be had about indirect consequences.. but you can only have those once you have the direct consequences straight.
There are real, genuine tradeoffs. Policy advocacy tends to obfuscate these... and that balloons out into a general confusion.