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Hugh Brock (1914 - 1985) was a lifelong British pacifist, editor of Peace News between 1955 and 1964, a promoter of nonviolent direct action and a founder of the Direct Action Committee, a forerunner of the Committee of 100.
He was a member of the Aldermaston March Committee which organised the first Aldermaston March against British nuclear weapons at Easter 1958; Chairman of the Direct Action Committee Against Nuclear War, 1958–61; Secretary of the Committee of 100, 1960–61; and a Council and Executive member of War Resisters' International, 1960–1988, chair from 1966-73.
With the formation in 1960 of the Committee of 100, which organised civil disobedience against nuclear weapons on a larger scale, the Direct Action Committee merged into the new organisation.