The Mormon presence in America has been historically influential to the nation, but is often overlooked or understated in non-Mormon institutions despite the fact their existence dates back to 1823. Under the Banner of Heaven: A Story of Violent Faith by Jon Krakauer is a non-fiction historical account of the Mormon religion, from its birth under the prophet Joseph Smith, to present times with the polygamy practicing fundamentalists and the milder mainstream Latter Day Saint church existing with identical core beliefs, but on opposite sides of the spectrum in terms of practices.The section of the book regarding the extreme fundamentalists, their history, and their current practices was an interesting look into a very different way of life. The split in the Mormon Church presented itself when the principle of polygamy was retracted by the prophet Wilford Woodruff. Those that accepted this revelation are the mass that is now called The Church of Latter Day Saints.