Miguel Humberto Enríquez Espinosa (Spanish pronunciation: [miˈɣel enˈrikes espiˈnosa]; March 27, 1944 – October 5, 1974[1]) was a physician and a founder of the Chilean Marxist-Leninist urban guerrilla Movement of the Revolutionary Left (MIR), founded in 1965.

After a year of Enríquez operating clandestinely, Pinochet's secret police, the DINA, discovered his safe-house in the working class district of San Miguel in Santiago.

With these friends and his elder brothers Marco Antonio and Edgardo Enríquez, Miguel would constitute at the end of the fifties the first core of comrades around his socialist-libertarian project of those early years.

[5] In 1962, during his second year at the university in Concepción, Miguel officially entered the youth organization of the Chilean Socialist Party (Federación Juvenil Socialista, FJS) together with his brother M. Antonio and some close peers of the medical school.

All these young men - except Martin Hernández - left the Socialist Party together with Miguel Enríquez in January 1964 amid a stormy National Convention held in the southern city of Concepción.

Chairman Ampuero, supported by a majority of the convention delegates, proceeded to marginalize Enríquez and his closest colleagues of the Spartacus cell from the Socialist Party, some of them in strategic leading positions inside the "Comité Regional de la Juventud Socialista".

In fact, Miguel had already organized (1963) a clandestine fraction called "Movimiento Socialista Revolucionario", or "MSR", integrated by a handful of his peers and his two elder brothers Marco Antonio and Edgardo Enríquez.

Among them Luciano Cruz Aguayo, Sergio Pérez Molina, Jorge Fuentes (nickname Trotsko), Edgardo Condeza, Juan Saavedra Gorriategy, Máximo Jara, and Horacio Vergara Mehrson.

All of whom, together with old-timers Marcello Ferrada de Noli, Bautista Van Schowen Vasey, Jorge Gutiérrez Correa, and his brothers Edgardo and Marco A., formed Miguel Enríquez first VRM-group in Concepción, the embryo of MIR.

After the September 11, 1973 coup Miguel Enríquez and other members of the MIR refused to accept political asylum in foreign embassies and rejected a condition of exile outside their country – considering the act of fleeing for personal security a form of betrayal to their socialist cause.

The MIR became of particular concern to Pinochet because it had had no formal organization framework and relied on cells; much of its activities were unpredictable and irregular in nature; they had also managed to infiltrate the Chilean Armed Forces.

This proved to be a precarious existence and Miguel was killed in a gun fight with agents of the Dirección de Inteligencia Nacional (DINA) (National Intelligence Directorate) in the slum home where he was carrying out his clandestine operations.