Foundation and Empire is a science fiction novel by American writer Isaac Asimov originally published by Gnome Press in 1952.

Foundation and Empire saw multiple publications—it also appeared in 1955 as Ace Double (but not actually paired with another book) D-125 under the title The Man Who Upset the Universe.

Barr is familiar with Hari Seldon's psychohistory and through it is confident of the Foundation's inevitable victory, an assertion Riose repeatedly disputes.

Devers is met by Ammel Brodrig, Emperor Cleon II's Privy Secretary who was sent to Riose in order to keep an eye on the general.

Devers and Barr head to Trantor in an attempt at turning Cleon II against Riose by implicating the latter in a conspiracy to overthrow the former with the help of Brodrig.

However, in their attempt to bribe their way up the chain of bureaucracy, they are caught in the act by a member of the Secret Police, but manage to flee the planet before they are arrested.

During their escape, they intercept news of Bel Riose and Brodrig's recall and subsequent arrest for treason (both are later said to have been executed), which leads to Siwenna's rebellion and the end of the threat to the Foundation.

Approximately one hundred years later, The Empire, after its final phase of decline and civil war, has ceased to exist, Trantor has suffered "The Great Sack" by a "barbarian fleet," and only a small rump state of 20 agricultural planets remain.

The outline of the Seldon Plan has become widely known, and Foundationists and many others believe that as it has accurately predicted previous events, the Foundation's formation of a Second Empire is inevitable.

Groff Conklin described Foundation and Empire as "fine swashbuckling galactic adventure [based] on some extremely hard-headed, scientific and mature social-political thinking.

"[2] Boucher and McComas, however, panned the volume, declaring that "Anyone with a nodding acquaintance with Gibbon, Breasted, or Prescott will find no new concepts [here] save the utterly incomprehensible ones contained in the author's own personal science of 'psycho-history'.