In Christian eschatology, postmillennialism is an interpretation of chapter 20 of the Book of Revelation which sees Christ's second coming as occurring after (Latin post-) the millennium, the Golden Age or era of Christian prosperity and dominance. The term subsumes several similar views of the end times, and it stands in contrast to premillennialism and amillennialism.Although some postmillennialists hold to a literal millennium of 1,000 years, most postmillennialists see the thousand years more as a figurative term for a long period of time (similar in that respect to amillennialism). Among those holding to a non-literal "millennium" it is usually understood to have already begun, which implies a less obvious and less dramatic kind of millennium than that typically envisioned by premillennialists, as well as a more unexpected return of Christ.
Postmillennialism also teaches that the forces of Satan will gradually be defeated by the expansion of the Kingdom of God throughout history up until the second coming of Christ. This belief that good will gradually triumph over evil has led proponents of postmillennialism to label themselves "optimillennialists" in contrast to "pessimillennial" premillennialists and amillennialists.
