Later, Joseph Fielding Smith published his book "Man: His Origin and Destiny", which denounced evolution without qualification. Similar statements of denunciation were made by Bruce R. McConkie, who as late as 1980 denounced evolution as one of "the seven deadly heresies" (BYU Fireside, June 1, 1980), and stated: "There are those who say that revealed religion and organic evolution can be harmonized. This is both false and devilish." Evolution was also denounced by the conservative Ezra Taft Benson, who as an Apostle called on members to use the Book of Mormon to combat evolution and several times denounced evolution as a "falsehood" on a par with socialism, rationalism, and humanism. (Ezra Taft Benson, Conference Report, April 5, 1975).