Georgism isn’t a about seizing land; it’s about socializing rent through taxation while keeping private use and markets intact.
Socialist revolutions “eliminated landlordism” by abolishing private land ownership, but often replaced it with state landlordism and political allocation which equally involves rent seeking behavior.
Georgism aims to eliminate unearned rent, not ownership, by making it unprofitable to hold land. The absence of “Georgist revolutions” isn’t evidence against the idea. It reflects that Georgism works through fiscal reform, not regime change. In both Soviet Union and China land was collectivized, which removed incentives for land use, agricultural output fell and a famine followed. Private landlordism was replaced with regulatory capture and misallocation. Now, China and many east Asian countries have switched to a land lease system, which is essentially a land value tax.
Where land value taxation has been used (e.g., in parts of Australia, Taiwan, Pennsylvania, Denmark, Estonia, South Africa, New Zealand), land appropriation fell without needing a regime change and with less potential for regulatory capture.
No place has fully adopted it though. It remains with very small tax rates. Scholars have argued this is because economists like John Bates Clark (foundational to the still dominant school of economics: the neoclassical school) was paid by landlord lobby to make “land, capital and labor” into “capital and labor”. Land was forgotten, and the legacy still lives on in academia. I studied spatial economics and never heard of Henry George.