Jehovah's Witnesses is a millenarian

Millennialism

Millennialism , or chiliasm in Greek, is a belief held by some Christian denominations that there will be a Golden Age or Paradise on Earth in which "Christ will reign" for 1000 years prior to the final judgment and future eternal state...

 restorationist Christian

Christian

A Christian is a person who adheres to Christianity, an Abrahamic, monotheistic religion based on the life and teachings of Jesus of Nazareth as recorded in the Canonical gospels and the letters of the New Testament...

 denomination

Christian denomination

A Christian denomination is an identifiable religious body under a common name, structure, and doctrine within Christianity. In the Orthodox tradition, Churches are divided often along ethnic and linguistic lines, into separate churches and traditions. Technically, divisions between one group and...

 with nontrinitarian beliefs distinct from mainstream Christianity

Christianity

Christianity is a monotheistic religion based on the life and teachings of Jesus as presented in canonical gospels and other New Testament writings...

. The religion reports worldwide membership of over 7 million adherents involved in evangelism

Evangelism

Evangelism refers to the practice of relaying information about a particular set of beliefs to others who do not hold those beliefs. The term is often used in reference to Christianity....

, convention attendance of over 12 million, and annual Memorial attendance of over 18 million. They are directed by the Governing Body of Jehovah's Witnesses

Governing Body of Jehovah's Witnesses

The Governing Body of Jehovah's Witnesses is the ruling council of Jehovah's Witnesses based in Brooklyn, New York. The body assumes responsibility for formulating policy and doctrines, producing material for publications and conventions, and administering its worldwide branch office staff...

, a group of elders in Brooklyn, New York

Brooklyn

Brooklyn is the most populous of New York City's five boroughs, with nearly 2.6 million residents, and the second-largest in area. Since 1896, Brooklyn has had the same boundaries as Kings County, which is now the most populous county in New York State and the second-most densely populated...

, that establishes and controls all doctrines.