Pro+Mil stands for pro-millennialism, which is a defense of the Biblical Premillennial teachings of the Scriptures, the explicit Biblical teaching that the coming of the prophesied King will precede the establishment of his Kingdom on earth where he will reign with his saints for a ‘thousand years’.
It stands in contrast with A+Mil, or the anti-premillennialism, a heresy introduced in the Fourth Century thanks to the allegorical interpretive skills of Augustine of Hippo. This unbiblical error teaches that we are now living in the promised Millennial Kingdom but when pressed further they will say, “No not yet.”
Confusing? I know.
Although the idea of the Millennial Kingdom can only be found in Revelation 20, it is better known as the “Kingdom of God” or the “Kingdom of Heaven” in the Four Gospels.
Revelation 19:11-21 and 20:1-6 give us five (5) specific criteria for its fulfillment:
First, Jesus Christ has already descended from heaven with power and great glory (Rev. 19:11-21 c.f. Luke 21:27; Acts 1:11; 1 Thes. 4:16).
Second, what John referred to as the Beast, the same Lawless One Paul referred to is already destroyed by the coming of Christ (Rev. 19:14-20 c.f. 2 Thes. 2:3-9).
Third, Satan, who gave power to the Beast, is not just bound but also locked up and sealed in the bottomless pit so as not to deceive the nations (Rev. 20:1-3 c.f. 2 Thes. 2:9-10).
Fourth, the dead in Christ has already been resurrected (Rev. 20:4b-6 c.f. 1 Thes. 4:16-17)
Fifth, Christ sits on his glorious throne with his saints reigning with him on the earth (Rev. 5:10; 20:4a, 6 c.f. Mat. 25:31; 2 Tim. 2:12).
Without these five Biblical criteria we’re not to believe those who say that the Kingdom is already here or there (Luke 17:23), because “the Kingdom that is here but not yet” isn’t really here yet.
Recommended Reading: What is the Kingdom of Heaven?