Foundation: The Complete Guide to Isaac Asimov's Galactic Empire

Hari Seldon has done the arithmetic, and the arithmetic says the Galactic Empire is already dead. Psychohistory, his statistical science of human masses, cannot save twenty-five million worlds from thirty thousand years of barbarism; it can only shorten the darkness to a single millennium. So Seldon plants a colony of scientists at the rim of the galaxy and dies, leaving them a plan he refuses to explain, because knowing the plan would break it.

Asimov wrote that premise as a serial in the 1940s, stitched it into the Foundation trilogy in the early 1950s, and returned thirty years later to weld it to his other great cycle, the Robot novels, until nearly everything he wrote shared one future history spanning twenty thousand years. This guide covers the whole architecture: the trilogy, the late sequels and prequels, the Robot mysteries, the Empire novels between them, and the Apple TV+ series that finally put Seldon on screen.

One future history

Read in publication order, the universe assembles itself the way Asimov did: trilogy first, then the 1980s sequels that widen the search for Earth, then the prequels that turn Hari Seldon from a statue into a man. The Robot novels run in parallel, beginning as locked-room mysteries starring the detective Elijah Baley and his android partner R. Daneel Olivaw, and the three Empire novels sketch the millennia between. Asimov spent his final decade connecting them: Robots and Empire is the weld, and one quiet presence turns out to run through the whole structure.