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A radical movement of the 1960s and 1970s. New Leftists opposed the military-industrial complex and involvement of the United States in the Vietnam War; they urged more public attention to conditions of black people and the poor. New Leftists were less theoretical than communists and generally did not admire the Soviet Union. But many of them were interested in Maoism, and they spoke strongly for “participatory democracy.” (See sit-ins.)