The foundation trilogy

Blurb

It is the story of the Galactic Empire, crumbling after twelve thousand years of rule. And it is the particular story of psycho-historian Hari Seldon, the only man who can see the horrors the future has in store: a dark age of ignorance, barbarism and violence that will last for thirty thousand years. The World Science Fiction Convention of 1966 voted The Foundation Trilogy the "greatest all-time science-fiction series."