Jehovah's Witnesses is a nontrinitarian, millenarian, restorationist Christian denomination. As of 2023, the group reported approximately 8.6 million members involved in evangelism, with around 20.5 million attending the annual Memorial of Christ's death. 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.

Nontrinitarianism is a form of Christianity that rejects the mainstream Christian theology of the Trinity—the belief that God is three distinct hypostases or persons who are coeternal, coequal, and indivisibly united in one being, or essence. Certain religious groups that emerged during the Protestant Reformation have historically been known as antitrinitarian.