The apocalyptic worldview holds that God’s good world is now under the control of evil angels or demons. At its core, apocalypticism is a theodicy - - an attempt to reconcile a good God with evil in the world.

In most of the Old Testament, humans are responsible for their own wickedness (the serpent doesn’t force Eve to do anything), and God shows God’s justice by rewarding and punishing human deeds. But some OT texts challenge this idea: Job argues (correctly, according to the story) that he suffers unjustly, and Ecclesiastes laments that the good and bad in life simply happen, without any apparent reason.

Apocalypticism insists, instead, that fallen angels have taken control of creation, and that the justice of God (who has effectively relinquished control) will only be seen at the end of time, when wickedness reaches its climax and God steps in to end history, destroying the wicked and vindicating the righteous. The world will be transformed into a new age that will have no wickedness or suffering. God will again be in control, and the world will work like it’s supposed to work. Bits of apocalypticism can be found in the OT (esp. the end of Isaiah and the second half of Daniel), but it flourishes in Jewish literature in the centuries just before Jesus.

Apocalypticism is at the heart of New Testament theology. Jesus’ proclamation of the Kingdom of God meant that God would soon take back control of the world. Paul argued that Jesus had initiated the end times, and that he would soon return to set the world right again. Revelation insisted that a new heaven and earth would soon replace the old, fulfilling Isaiah 65:17.

This affects how Christians live, because we believe in the paradox that the world is a good place, but that it is influenced by forces of evil that will never be fully overcome until Jesus’ return. We work for good, but we know that human progress can never fully redeem the earth; that task is reserved for the avenging Son of Man at the end of time as we know it.

Reading suggestions: Within scripture, important apocalyptic passages include Isaiah 65:17–66:24; Daniel 7-12; Mark 13; 1 Thessalonians 4:13-18; 2 Peter 3:3-10; and of course the book of Revelation.

Even better, the most important apocalyptic work of all is probably 1 Enoch, which you can read online here (see esp. chs. 6-10 and 45-51). 1 Enoch was actually written in pieces, much of it from around 200 B.C., and one important part (including chs. 45-51) from probably around the time of Jesus.

For secondary literature, I’m a big fan of John Collins, so I’d suggest his book The Apocalyptic Imagination: An Introduction to Jewish Apocalyptic Literature. Also, see my related post here.