From Wikipedia: Georgism, also called geoism and single tax (archaic), is an economic philosophy holding that, while people should own the value they produce themselves, economic value derived from land (including natural resources and natural opportunities) should belong equally to all members of society. Developed from the writings of the economist and social reformer Henry George, the Georgist paradigm seeks solutions to social and ecological problems, based on principles of land rights and public finance which attempt to integrate economic efficiency with social justice.

Or, in simpler terms: You are entitled to the fruits of your labor, but land was not made with labor. Therefore, we must make land common property through the means of taxation.

Other Georgist or Otherwise Relevant Subreddits

• /r/georgism
• /r/newphysiocrats
• /r/geolibertarianism
• /r/neoliberal
• /r/economics
• r/Geoanarchism/