Joseph Smith: Founder of Mormonism, Polygamy, and Assassination

Joseph Smith’s life reads like a 19th-century American epic — a farm boy who claimed to see God, translated ancient records, and built a religious movement that still draws millions. But his story also includes hard questions about polygamy, secret marriages, and a violent death that still sparks debate. This article looks at the facts behind the controversies, from his early leg surgery to his final hours in Carthage Jail.

Full name: Joseph Smith Jr. ·
Born: December 23, 1805 ·
Died: June 27, 1844 ·
Age at death: 38 years ·
Known for: Founding Mormonism, polygamy, Book of Mormon ·
Number of wives (documented): 34–40

Eight key facts about Joseph Smith, one pattern: the man behind the movement remains a figure of both reverence and controversy.

What is Joseph Smith famous for?

Joseph Smith is best known as the founder of the Latter Day Saint movement, also called Mormonism. He published the Book of Mormon in 1830, claiming it was a translation of ancient golden plates he received from an angel. He also practiced polygamy, marrying multiple women — some as young as 14. Smith’s death at the hands of a mob in Carthage, Illinois, on June 27, 1844, sealed his legacy as a martyr for his followers and a controversial figure for critics (Encyclopaedia Britannica).

How did Joseph Smith found Mormonism?

Smith reported a series of visions beginning in 1820, known as the First Vision, in which he said God the Father and Jesus Christ appeared to him. In 1827 he claimed to have obtained golden plates from an angel named Moroni, which he translated into the Book of Mormon (PBS American Experience). The Church of Christ (later renamed The Church of Jesus Christ of Latter-day Saints) was formally organized on April 6, 1830. Smith’s movement grew rapidly, attracting tens of thousands of followers by the time of his death (Wikipedia).

The pattern is clear: Smith’s claim of direct divine communication gave him authority that no other religious leader of his time could match. Oliver Cromwell: The Lord Protector Who Refused a Crown offers a parallel in how a single figure can reshape a nation’s religious and political landscape through sheer force of conviction.

The implication: Smith’s authority derived not from institutional credentials but from his personal narrative of angelic visitations — a claim that either inspires faith or invites skepticism.

How many wives did Joseph Smith have?

According to Encyclopaedia Britannica, Smith was sealed to about 30 wives, while other estimates range from 34 to 40. The youngest was Helen Mar Kimball, aged 14, married in 1843 when Smith was 37 (Joseph Smith’s Polygamy). Several other wives were between ages 14 and 20. Most marriages were performed in secret, and historians debate whether they were consummated or purely spiritual.

How old was Joseph Smith when he married his 14-year-old wife?

Smith was 37 when he married Helen Mar Kimball in 1843 (Wikipedia). The marriage was arranged by her father, a close associate of Smith, and Helen later wrote that she struggled with the arrangement.

How many underage wives did Joseph Smith have?

According to Joseph Smith’s Polygamy, at least three of Smith’s wives were under 18 at the time of marriage: Helen Mar Kimball (14), Nancy Rigdon (15), and Mary Rollins (17). The exact number is uncertain due to incomplete records.

Did Joseph Smith marry teenagers?

Yes. Multiple documented marriages involved teenage brides. The PBS American Experience notes that the practice of polygamy, including marriages to young women, was a closely guarded secret that caused deep divisions within the church.

What led to the death of Joseph Smith?

Smith was killed by a mob while imprisoned in Carthage Jail on June 27, 1844. The immediate cause was his decision to order the destruction of the Nauvoo Expositor, a newspaper that criticized his polygamy and political power. The city council, under Smith’s direction, declared the newspaper a public nuisance. This led to charges of treason, and Smith was arrested. While awaiting trial, a lynch mob stormed the jail and shot him (Encyclopaedia Britannica).

Why was Joseph Smith assassinated?

The assassination was the culmination of long-simmering tensions over polygamy, political power, and the growing influence of the Mormon community in Illinois. PBS American Experience reports that criticism increased when rumors of polygamy spread within and outside the community. Smith’s declaration of martial law in Nauvoo further inflamed the situation. As with Kim Jong Il: Biography, Death, Legacy of North Korea’s Dictator, the death of a controversial leader often reshapes the movement’s trajectory.

What disease did Joseph Smith have?

As a child, Smith suffered from a severe bone infection in his left leg, likely osteomyelitis (Wikipedia). In 1813, at age 7 or 8, doctors performed a risky surgery to remove infected bone. Smith endured the procedure without alcohol or sedation, a testament to his pain tolerance. He recovered fully and credited the surgery with saving his leg.

What surgery saved Joseph Smith’s leg?

According to Wikipedia, the surgery involved cutting into the leg and scraping out infected bone fragments. Smith’s mother, Lucy Mack Smith, later wrote that he “endured the operation without a murmur.” The success of the surgery allowed him to lead an active life, including long journeys and physical labor.

What this means: Smith’s early physical trial foreshadowed a life marked by both suffering and resilience — a pattern that his followers would later interpret as preparation for his prophetic mission.

Who do Mormons say Jesus is?

Mormons (Latter-day Saints) believe Jesus Christ is the Son of God and the Savior of the world. They accept the New Testament accounts but also believe in additional scripture — the Book of Mormon, Doctrine and Covenants, and Pearl of Great Price — that affirm Jesus’ divinity and atonement. A key difference from mainstream Christianity: Mormon theology teaches that Jesus and God the Father are distinct beings with physical bodies, and that humans can become like God through exaltation (Wikipedia).

The implication: Smith’s teachings on the nature of God remain one of the most distinctive and controversial aspects of Mormon doctrine, setting it apart from traditional Christian creeds.

For the LDS Church today, the legacy of Joseph Smith is a double-edged sword: his claims of divine revelation continue to inspire millions, but his polygamy and turbulent death remain unresolved historical wounds. For historians and believers alike, the task is not to smooth over the contradictions but to understand them — because the man who founded Mormonism was as complex and contradictory as the movement he started.

For a deeper look into the controversies surrounding his life, see Joseph Smiths polygamy and assassination.

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