Daniel Berrigan.

The brothers Daniel Berrigan (born 1921) and Philip Berrigan (born 1923) have both been prominent in resistance to racial segregation, to U.S. involvement in the Vietnam war, and to the production of nuclear weapons. Philip Berrigan, a former Josephite priest, and Daniel, a Jesuit priest, poet, playwright, and teacher, are both lecturers and civil disobedience activists.

From the guide to the Daniel and Philip Berrigan Collection, 1880-1995, (Division of Rare and Manuscript Collections, Cornell University Library)