William Wines Phelps was an early leader of the Latter Day Saint movement. He printed the first edition of the Book of Commandments that became a standard work of the church and wrote numerous hymns, some of which are included in the current version of the Church of Jesus Christ of Latter-day Saints' hymnal. He was at times both close to and at odds with church leadership. He testified against Joseph Smith, providing evidence that helped persuade authorities to arrest Smith. He was excommunicated three times and rejoined the church each time. He was a ghostwriter for Smith. Phelps was called by Smith to serve as assistant president of the church in Missouri and as a member of the Council of Fifty. After Smith's death, Phelps supported Brigham Young, who was the church's new president.

"The Council of Fifty" was a Latter Day Saint organization established by Joseph Smith in 1844 to symbolize and represent a future theocratic or theodemocratic "Kingdom of God" on the earth. Smith prophetically claimed that this Kingdom would be established in preparation for the Millennium and the Second Coming of Jesus.