The American church denominations rejected Darby's ecclesiology but accepted his eschatology. Its followers also believe in premillennial eschatology. Some scholars believe that key concepts of Zoroastrian eschatology and demonology influenced the Abrahamic religions. The conference focuses on worship music and sermons on prayer, evangelism, and Christian eschatology. He is usually equated with the Antichrist in Christian eschatology. The key feature was the rejection of apocalyptic eschatology. Evangelical views on eschatology (the doctrine of the end times) have changed over time. Later followers, inspired by his works in eschatology and historicist theories, are called Joachimites. This teaching is upheld by the official eschatology, which is a form of church historicism. Groups claiming "imminent" eschatology are also referred to as doomsday cults. See Book of Revelation 20 and Christian eschatology. The Book of Revelation is at the core of Christian eschatology. Instead, the eschatology of other religions is viewed as symbolic. The eschatology of Jehovah's Witnesses is central to their religious beliefs. Second Temple eschatology was significantly influenced by Zoroastrianism.