Clergy and Laymen Concerned About Vietnam (CALCAV) was officially founded on October 28, 1965 at the Church Center for the United Nations by Rev. Richard Neuhaus (Lutheran pastor), Rabbi Abraham Joshua Heschel (Jewish scholar and professor) and Fr. Daniel Berrigan SJ (prominent Catholic voice against the war). Martin Luther King Jr. became national co-chair, strengthening the breadth and reach of this new national organization. Neither pacifist nor radical, CALCAV was seen as a moderate movement, drawing upon the biblical roots of peacemaking as well as the strong tradition of democratic dissent. It was a highly influential religious voice for ending the war. After the war ended, it changed its name to Clergy and Laity Concerned (CALC) and worked on a number of national and international peace and justice issues.