The physician who became a major general and then the Church's most notorious apostate

Countries & Cities · Published 15 October 2026 Swipe more like this →

In short: John C. Bennett arrived in Nauvoo as a celebrated convert and influential leader, securing the city charter and rising to the rank of major general. Yet, within two years, his secret life of manipulation and scandal triggered a dramatic downfall, transforming him into the Church's most vocal and damaging critic.

Born in 1804 in Massachusetts, John C. Bennett was a physician and professor who initially impressed Joseph Smith with his offer to raise an army to support the Saints. After arriving in Nauvoo in 1840, his rapid ascent was remarkable. He helped secure the crucial Nauvoo city charter, became the city's first mayor in February 1841, and served as chancellor of the University of Nauvoo. By April 1841, he was sustained as an assistant president in the First Presidency, a position he held while Sidney Rigdon’s health was compromised.

However, by 1842, his reputation collapsed as his private conduct came to light. Bennett was accused of using his medical authority to manipulate women into illicit relationships, which he falsely claimed were sanctioned by the Prophet. His influence was so significant that his subsequent excommunication and campaign of libel—including a book titled The History of the Saints—fostered intense public bitterness against the Church. The Prophet was forced to call upon nearly 380 elders to travel on special missions to counter the prejudice Bennett had successfully stoked.

Following the death of Joseph Smith, Bennett’s career took a final, erratic turn. He attempted to seize control of the Church by presenting a forged revelation naming Sidney Rigdon as the successor. When this failed, he defected to the faction led by James J. Strang, where he introduced polygamy to the Michigan community and founded the Halcyon Order of the Illuminati. By 1847, he was excommunicated from the Strangite group, ending his involvement with the movement. He died in 1867 in Polk City, Iowa, leaving behind a legacy as one of the most controversial figures in early Mormon history.

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