The Plan of San Luis Potosí was a political manifesto issued by Francisco I. Madero in 1910 that called for the overthrow of the long-standing dictator Porfirio Díaz and the establishment of democratic reforms in Mexico. This document is considered a pivotal moment in the early stages of the Mexican Revolution, rallying support for Madero's cause against Díaz and setting the stage for a broader movement aimed at social and political change.