While little is known about the Council, records indicate that its organization was to be based upon the principles extant in the United States Constitution, and in theory God's Political Kingdom was to be a modified republic. In fact, as mentioned below, evidence suggests that membership in the Council was not meant to be exclusive to Mormons. Thus, while many use the term "theocracy" to describe Latter-day Saint theories of a perfect millennial government, perhaps more accurate is the concept of "THEODEMOCRACY," a term coined by Joseph Smith. He described Theodemocracy as a system wherein God and the people held the power to rule in righteousness. This reflects the deeply held LDS belief in moral agency, which on a theological and philosophical level requires earthly governments to allow for individual decision making processes. In essence, the existence of choice is a moral requirement and a religious tyranny would be antithetical to Mormon beliefs. Yet this concept also reflects God's divine right to rule His people as "king of kings" and "lord of lords."
Like many Restorationists in the mid-19th century, the Mormons believed that the second coming of Jesus was imminent, and would be attended by great destruction. After this destruction occurred, some structure would be necessary to politically organize the survivors. Joseph Smith received a revelation on April 7, 1842 calling for the establishment of an organization called the Living Constitution, or later the Council of Fifty. This would serve as the foundation for the establishment of Christ's Millennial government. The organization was formally established by Joseph Smith in Nauvoo, Illinois on March 11, 1844. The "clerk of the Kingdom", William Clayton, recorded that exactly one month later, Joseph Smith was "chosen as our Prophet, Priest, and King by Hosannas" , and then an ordinance was performed in which Smith was "ordained to be a king, to reign over the house of Israel forever" . However hyberbolic and misstated rumors associated with this occurrence likely contributed to Joseph Smith's assassination in June of 1844.
According to John D. Lee, the official scribe of the Council, the organization was meant to be the "Municipal department of the Kingdom of God set upon the earth, and from which all law emanates, for the rule, government & controle of all Nations Kingdoms & toungs and People under the whole Heavens. [sic]"
Smith served as the president of the Council during his lifetime, after which Brigham Young presided, and then John Taylor. The Quorum of the Twelve Apostles, who each were members of the Council, had a special leadership role. However, all actions by the body were officially to be taken only after unanimous vote. During Smith's lifetime, meetings of the Council were held in secret.
Alpheus Cutler referred to an executive council within the Council of Fifty, which he termed the Quorum of the Seven. Willard Richards served as historian/recorder from 1844 to his death in 1854. George Q. Cannon was the final recorder for the Council and served from 1867 to his death in 1901. William Clayton served as clerk of the Kingom from 1844–1879. In 1880, He was followed in office by L. John Nuttall. John Taylor's son, William Whittaker Taylor was assistant clerk from 1880-1884.
There are forty-six known members of the pre-martyrdom Council of Fifty. It included all members of the Quorum of the Twelve Apostles at the time in which it was active both in Nauvoo and in Utah. Notably, it did not include the two counselors to the First Presidency in Nauvoo, Sidney Rigdon and William Law. Other members included:
One duty of the Council was to assist in Joseph Smith's 1844 campaign for President of the United States. Smith ran on a platform among church members of bringing restitution for land and property lost in Missouri, eliminating slavery, compensating slave-owners with the sale of private lands, reducing the salaries of members of Congress, eliminating debt imprisonment, etc. Members of the Council campaigned throughout the United States. Besides sending out hundreds of political missionaries to campaign for Smith throughout the U.S., they also appointed fellow members of the Fifty as political ambassadors to Russia, the Republic of Texas, Washington D.C., England, and France. However, Smith was murdered by a large mob in the midst of his presidential campaign. The campaign was meant to bring greater notoriety the plight of the Mormons who had received no state or federal restitution for hundreds of thousands of dollars worth of property lost to mob violence in relation to the 1838 Mormon War. However, Smith's Presidential campaign, the Nauvoo Expositor incident, and even hyperbolic and innacurate rumors about the Council of Fifty helped create the local unrest that led to his assassination.
After Smith's death, the Council anointed Brigham Young its leader, and as the "king and [[President of the Church|pres[iden]t]]" of the Kingdom of God. Under Young, however, the Council continued to have relatively little power .
However, the Council assisted in the exodus from Nauvoo, Illinois and the eventual migration to the Great Basin area of what is now Utah. Young relied upon the results of scouting missions by members of the Council in choosing the Great Basin as a destination for their exodus from Nauvoo, over several alternate possibilities including Texas, California, and Oregon.
The council was to act as a legislative body in the Kingdom of God and in Utah, the Council became a provisional legislative body in the government. This continued until September 1850 when Congress organized the Territory of Utah upon petition by the church. See State of Deseret; Territory of Utah. After Utah became a territory, the Constitutional requirements of separation between church and state sharply diminished the Council's official role in government. The Council then suspended meetings in October 1851. The council met again on October 9, 1868 and voted for the establishment of Zion's Co-operative Mercantile Institution (ZCMI).
Briefly, the Council resurfaced during the administration of John Taylor, in an advisory role on the issue of polygamy. The Council's last recorded meeting was in 1884.