He remained one for the rest of his life, dying in 1933 at 76. He served in World War I as a chaplain and was elected to the U.S. Congress in 1898, although that body refused to seat him because he was a polygamist. He married three wives and had 15 children.
Roberts was unique within the LDS hierarchy for his reasoning that evolution and Gospel doctrines did not conflict. He wrote a book, “The Truth, The Way, The Life,” that was not published due to the objections of creationist Apostle Joseph Fielding Smith. It eventually was published in 1994.