Joseph Franklin Rutherford in the context of "Jehovah's Witness"

Jehovah's Witnesses is a nontrinitarian, millenarian, and restorationist Christian denomination, stemming from the Bible Student movement founded by Charles Taze Russell in the nineteenth century. Russell co-founded Zion's Watch Tower Tract Society in 1881 to organize and print the movement's publications. A leadership dispute after Russell's death resulted in several groups breaking away, with Joseph Franklin Rutherford retaining control of the Watch Tower Society and its properties. Rutherford made significant organizational and doctrinal changes, including adoption of the name Jehovah's witnesses in 1931 to distinguish the group from other Bible Student groups and symbolize a break with the legacy of Russell's traditions. In 2024, Jehovah's Witnesses reported a peak membership of approximately 9 million worldwide.

Jehovah's Witnesses are known for their evangelism, distributing literature such as The Watchtower and Awake!, and for refusing military service and blood transfusions. They consider the use of God's name vital for proper worship. They reject Trinitarianism, inherent immortality of the soul, and hellfire, which they consider unscriptural doctrines. Jehovah's Witnesses believe that the destruction of the present world system at Armageddon is imminent, and the establishment of God's kingdom over earth is the only solution to all of humanity's problems. They do not observe Christmas, Easter, birthdays, or other holidays and customs they consider to have pagan origins incompatible with Christianity. They prefer to use their own Bible translation, the New World Translation of the Holy Scriptures.

The Bible Student movement is a Millennialist Restorationist Christian movement. It emerged in the United States from the teachings and ministry of Charles Taze Russell (1852–1916), also known as Pastor Russell, and his founding of the Zion's Watch Tower Tract Society in 1881. Members of the movement have variously referred to themselves as Bible Students, International Bible Students, Associated Bible Students, or Independent Bible Students.

A number of schisms developed within the congregations of Bible Students associated with the Watch Tower Society between 1909 and 1932. The most significant split began in 1917 following the election of Joseph Franklin Rutherford as president of the Watch Tower Society two months after Russell's death. The schism began with Rutherford's controversial replacement of four of the Society's board of directors and publication of The Finished Mystery in July 1917.

Charles Taze Russell (February 16, 1852 – October 31, 1916), or Pastor Russell, was an American Adventist minister from Pittsburgh, Pennsylvania, and founder of the Bible Student movement. He was an early Christian Zionist.

In July 1879, Russell began publishing a monthly religious magazine, Zion's Watch Tower and Herald of Christ's Presence. In 1881, he co-founded Zion's Watch Tower Tract Society with William Henry Conley as president. In 1884 the corporation was registered, with Russell as president. Russell wrote many articles, books, tracts, pamphlets and sermons, totaling approximately 50,000 pages. From 1886 to 1904, he published a six-volume Bible study series titled Millennial Dawn, later renamed Studies in the Scriptures, nearly 20 million copies of which were printed and distributed around the world in several languages during his lifetime. (A seventh volume was commissioned by his successor as society president, Joseph Rutherford, and published in 1917.) The Watch Tower Society ceased publication of Russell's writings in 1927, though his books are still published by several independent groups.

A dispute developed in 1917 within the leadership of the Watch Tower Bible and Tract Society following the death of society president Charles Taze Russell and the election of legal counsel Joseph Franklin Rutherford as his successor. An acrimonious battle ensued between Rutherford and four of the society's seven directors, who accused him of autocratic behavior and sought to reduce his powers. Rutherford claimed the dissident directors had formed a conspiracy to seize control of the society and overcame the challenge by gaining a legal opinion that his four opposers had not been legally appointed. He subsequently replaced them with four new sympathetic directors.

The four ousted directors later gained 12 legal opinions that Rutherford's actions were unlawful. The leadership crisis divided the Bible Student community and helped contribute to the loss of one-seventh of the Watch Tower adherents by 1919.

The doctrines of Jehovah's Witnesses have developed since the publication of The Watchtower magazine began in 1879. Early doctrines were based on interpretations of the Bible by Watch Tower Bible & Tract Society founder Charles Taze Russell, then added to, altered, or discarded by his successors, Joseph Rutherford and Nathan Knorr. Since 1976, doctrinal changes have been made at closed meetings of the group's Governing Body, whose decisions are described as "God's progressive revelations".These teachings are disseminated through The Watchtower, and at conventions and congregation meetings. Most members of the denomination outside the Governing Body play no role in the development of doctrines and are expected to adhere to all those decided at the Warwick, NY headquarters. Jehovah's Witnesses are taught to welcome doctrinal changes, regarding such "adjustments" as "new light" or "new understanding" from God and proving that they are on the "path of the righteous".