Rubén Agnelio Martínez Villena (December 20, 1899 – January 16, 1934) was a Cuban writer, lawyer, and revolutionary leader. He was the ringleader of the Protest of the Thirteen, the first protest of the Cuban intellectual class since the country had gained its independence, and signed the "Manifesto of the Group of Thirteen." He was also the founder of the Minorista Group, a group of Cuban intellectuals which was called the "Vanguard of the Intelligentsia." He led the 1933 General Strike which in a small part helped to oust Gerardo Machado from power, and died the following year after a long battle with tuberculosis.
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