Jesus' crucifixion, although some scholars question the historical value of the passage on various grounds. Mythicist view Myth proponents note that the Testimonium Flavianum is likely a forgery by Christian apologist Eusebius in the 4th century or by others. Richard Carrier further argues that the original text of Antiquities 20 referred to a brother of the high priest Jesus son of Damneus, named James, and not to the Jesus of Christianity. Carrier further argues that the words "the one called Christ" likely resulted from the accidental insertion of a marginal note added by some unknown reader. Christ myth theory supporters such as Carrier note that sources such as Tacitus and others, which were written decades after the supposed events, include no independent traditions that relate to Jesus, and hence can provide no confirmation of historical facts about him. Other sources Mainstream view In Jesus Outside the New Testament (2000), Van Voorst considers references to Jesus in classical writings, Jewish writings, hypothetical sources of the canonical Gospels, and extant Christian writings outside the New Testament. He concludes that non-Christian sources provide "a small but certain corroboration of certain New Testament historical traditions on the family background, time of life, ministry, and death of Jesus", as well as "evidence of the content of Christian preaching that is independent of the New Testament", while extra-biblical Christian sources give access to "some important information about the earliest traditions on Jesus". However, New Testament sources remain central for "both the main lines and the details about Jesus' life and teaching". Jesus was a mythical being Syncretism and diversity Mainstream view Most historians agree that Jesus or his followers established a new Jewish sect that attracted both Jewish and gentile converts. Out of this Jewish sect developed Early Christianity, which was very diverse, with proto-orthodoxy and "heretical" views like Gnosticism alongside each other. According to New Testament scholar Bart D. Ehrman, a number of early Christianities existed in the first century AD, from which developed various Christian traditions and denominations, including proto-orthodoxy. According to theologian James D. G. Dunn, four types of early Christianity can be discerned: Jewish Christianity, Hellenistic Christianity, Apocalyptic Christianity, and early Catholicism. Mythicist view In Christ and the Caesars (1877), philosopher Bruno Bauer suggested that Christianity was a synthesis of the Stoicism of Seneca the Younger, Greek Neoplatonism, and the Jewish theology of Philo as developed by pro-Roman Jews such as Josephus.