The Mule was a "mentalic" mutant of enough power that he managed to overcome the forces of history and disrupt Hari Seldon's plans.

Were such mutants known prior to the Mule? (and known to Seldon)?

  • The wikipedia article reads; Foundation's Edge reveals that he originally came from the planet Gaia, but was regarded as an aberration on a world where mental powers were being developed for benevolent ends*. This suggests that his powers weren't unknown, even if he was at the extreme end of the bell-curve
    – Valorum
    Apr 21, 2014 at 0:26
  • @Richard - I'm not terribly familiar with Foundation (been a while since I read); I thought that said progress on Gaia was post-Seldon? Apr 21, 2014 at 0:30
  • @DVK: Prelude to Foundation implies that at least the beginning of said progress was pre-Seldon. I'll expand in my answer below. Apr 21, 2014 at 8:46
  • According to Foundation's Triumph, yes.
    – b_jonas
    Apr 21, 2014 at 19:32

2 Answers 2


The Mule was the first known human to display such remarkable mental abilities in the Foundation universe. He was preceded, however, by at least two - and possibly more - robots; R. Giskard Reventlov and R. Daneel Olivaw. The latter is probably the most important being in the entire Saga, with Seldon unarguably being the most important human. Seldon's robot wife, Dors Venabili, also possesses at least some of the same powers.

As Richard states in his comment above, the Mule was originally from Gaia, where such mental powers were common; it was directly stated in Foundation's Edge that these mental powers were taught to the humans of Gaia by robots, and it is implied in Prelude to Foundation that it is Daneel himself who founded Gaia. So the Mule isn't unique. Even the Second Foundation seemed to possess a weaker version of the Mule's power.

The Mule may have been more powerful than his predecessors; this is never stated, and he is eventually defeated by a weaker practitioner of his emotional control. Given his accomplishments, however, it seems likely that he was stronger than both his predecessors and his contemporaries, though Daneel and Gaia were hampered, even moreso than the Second Foundation, by the necessity of keeping their actions secret from the galaxy at large.

  • Expliciting what this answer says: he wasn't a mutant. Robots taught the ability to Gaians, and it is implied that robots with mentalics such as Bliss are still guiding the planet.
    – laffuste
    Jun 27, 2014 at 5:17
  • 2
    @Iaffuste: Let's not rule out that the Mule may indeed have been a mutant, even by the standards of Gaia. He was sterile, after all. His sterility may have been his mutation, or he may have possessed a more powerful, or somehow twisted version of emotional control than his fellow Gaians. He certainly seems to have possessed a very comprehensive ability to control multiple minds, which the Gaians never showed. Of course, the Gaians also never had to. Jun 27, 2014 at 9:16

In short: there are no other mentalic mutants known on the Foundation universe.

The Mule was a mutant, in a plot where they are really really scarce (this is not the Marvel universe). And moreover he was a mutant coming from a society (Gaia) that actively uses mental abilities. His are, anyway, unique. Gaians and robot telepathists concentrate on thoughts and communication, while the Mule had a super capability over emotions.

He did not instill the tought that he must be obeyed. He did instill loyalty as an emotion. He can not evem modify thoughts, only emotions, as can be seen on his encounters with Han Pritcher. Pritcher continues being an almost independent thinker, but just ultimately loyal.

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