Dr. Martin Luther King, Jr.
1929-1968

By 1967, King had also become the country's most prominent opponent of the Vietnam War, and a staunch critic of overall U.S. foreign policy, which he deemed militaristic. In his "Beyond Vietnam" speech delivered at New York's Riverside Church on April 4, 1967 -- a year to the day before he was murdered -- King called the United States "the greatest purveyor of violence in the world today."

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