Adolfo López Mateos was a Mexican politician and lawyer who served as President of Mexico from 1958 to 1964. Previously, he served as Secretary of Labor and Social Welfare from 1952 to 1957 and a Senator from the State of Mexico from 1946 to 1952.
Beginning his political career as a campaign aide of José Vasconcelos during his run for president, López Mateos encountered repression from Plutarco Elías Calles, who attempted to maintain hegemony within the National Revolutionary Party (PNR). He briefly abandoned politics and worked as a professor at the Autonomous University of Mexico State, becoming a member of the PNR (renamed Party of the Mexican Revolution) in 1941.