Jeffrey Nichols examines how prostitution became a focal point in the moral contest between Mormons and gentiles and aided in the construction of gender systems, moral standards, and the city's physical and economic landscapes. Gentiles likened polygamy to prostitution and accused polygamous Mormons of violating Christian norms of family structure and sexual behavior. Defending their church and its ideals, Mormons blamed gentiles for introducing the sinful business of prostitution into their honorable city. Nichols traces the interplay of prostitution and reform from the 1890s, when the Church of Jesus Christ of Latter-day Saints began to move away from polygamy, to World War I, when Mormon and gentile moral codes converged at the expense of prostitutes. He also considers how the conflict over polygamy distinguished Salt Lake City from other cities struggling to abolish prostitution in the Progressive Era.