Mani was born in Babylonia in 216 CE, in a Jewish-Christian baptist community, and left it at twenty-four claiming a revelation from his heavenly Twin. What he built out of that revelation was the most deliberately universal religion the ancient world produced: he wrote his own scriptures rather than leaving them to disciples, illustrated them, and had them translated on purpose, so the message would not warp as it moved. It moved a very long way. Within a few centuries Manichaean communities ran from Roman North Africa — where the young Augustine spent nine years as a Hearer — to Central Asia, and a Manichaean church survived in China into the Ming period.
The system starts from a single premise: Light and Darkness are two eternal, uncreated principles, and this world is the wreckage of their collision. Darkness attacked; Light sent a champion who was defeated and consumed; and the cosmos is the machinery built afterward to extract the swallowed Light from the Darkness that ate it. Everything alive holds some of that Light. This is why Manichaean ethics look extreme from outside — the Elect did not farm, harvest, or eat meat, because breaking a plant or killing an animal further wounds the Light held inside it. It also explains the two-tier community: the Elect kept the full rule, and the Hearers, who could not, fed and served them, laying up merit for a better rebirth.
Death sorts by which life you led. The soul of the Elect is met and led up the Column of Glory — the band of light the Greeks called the Milky Way — to the moon, the ship of living water, and from there to the sun, the ship of living fire, and out to the Realm of Light. The Hearer, meritorious but still entangled, takes the middle road: rebirth, another body, another attempt, and — in some texts — the hope of being born Elect next time. The one who spent a life adding to the mixture takes the third road, down. The Manichaean afterlife is thus not primarily about reward. It is about whether the Light you carried gets out.
The end has a shape too. When the harvest is finished and no more Light can be recovered, the cosmos is dismantled: a great fire burns for centuries, the remaining Darkness is sealed in a pit forever with the Light that could not be freed, and the recovered Light gathers into the Last Statue, a final image of everything salvaged, rising out of the burning. It is one of the strangest and most exact eschatological pictures ever drawn — the end of the world rendered as a smelting.
Manichaeism was persecuted by nearly everyone: Sasanian Zoroastrians executed Mani around 274, Roman emperors and later the Church suppressed it, and the Chinese state eventually turned on it. It died as a living faith. But it left a permanent word in every European language for the idea that good and evil are two matched powers — and it left Augustine, who spent the rest of his life arguing against the answer it had given him.