Revelation belongs to a recognized ancient genre, Jewish and early Christian apocalyptic literature, that used dense symbolism, numbered visions and coded imagery to describe present crisis and future hope, a genre readers of Daniel and 1 Enoch would have recognized immediately even where modern readers find it strange.
Most historical critical scholars read the beast and Babylon as veiled references to Roman imperial power and the cult of emperor worship that Christians in Asia Minor faced real pressure to join, with the number 666 widely explained through gematria, the ancient practice of assigning numerical values to letters, as encoding the name "Nero Caesar" in Hebrew script, an interpretation that also underlies the minority argument for an earlier, Neronic date. Despite that scholarly reading, Revelation has been reinterpreted as directly describing the reader's own age in nearly every subsequent century, and the disagreement over how literally to read its symbols, as coded history now fulfilled, as an unfolding future timeline, or as timeless spiritual truth restated in every age, remains a genuine, unresolved division across Christian traditions rather than a settled question. Its acceptance into the canon was also the slowest and least uniform of any New Testament book, excluded for generations by the Syriac church and doubted by major 4th century figures, before becoming universally received.