Since 1945, peace activism, both as directed against wars and against nuclear armament, has left deep marks on American culture and policy; literature helped facilitate these momentous cultural and political happenings. Many scholars would here make an important distinction between the work of anti-nuclear activists to further positive peace and the work of anti-war activists to further the mere negative peace, particularly of a cease fire or the withdrawal of American forces from a war zone. The breadth of the activist careers treated in this chapter, including those of the Berrigan brothers, who rose to prominence for resisting the Vietnam War and lived out a long activist trajectory that came to include anti-nuclear work, cautions against such a reductive view of anti-war work.