In her book Conscience, Louisa Thomas recounts the life of her great-grandfather, Norman Thomas, and his three brothers, who had conflicting views during World War I. The sons of a Presbyterian minister, two of the the Thomas brothers enlisted in the armed forces and two were pacifists. Norman Thomas, who also was a Presbyterian minister, was a pacifist who ran as a Socialist candidate for president six times following the war. Ms. Thomas was interviewed by Mr. Meacham and also responded to questions from members of the audience.