Zapatismo is the armed movement identified with the ideas of Emiliano Zapata, one of the leaders of the Mexican Revolution, reflected mainly in the Plan of Ayala (1911). The members of the Liberation Army of the South led by Zapata were known as "Zapatistas." Zapatismo is a form of agrarian socialism.

Land reform is a form of agrarian reform involving the changing of laws, regulations, or customs regarding land ownership. Land reform may consist of a government-initiated or government-backed property redistribution, generally of agricultural land. Land reform can, therefore, refer to transfer of ownership from the more powerful to the less powerful, such as from a relatively small number of wealthy or noble owners with extensive land holdings to individual ownership by those who work the land. Such transfers of ownership may be with or without compensation; compensation may vary from token amounts to the full value of the land.