And in discussing Hari Seldon, let us not forget that he was not a real person.
Okay, I know some of the readers on here have commented on the fact that he was a (fictitious) creation of Isaac Asimov (may his name be praised).
But... when Asimov wrote new books to combine the 'Federation' stories with the 'Robot' stories, it became clear that Hari Seldon was actually a robot. When, years after his (Hari Seldon's) 'death' he appeared as a recording/projection, it was the original (robot) Hari Seldon appearing to reinforce his predictions (or make comments that would guide humanity onto the 'correct' path)

Cheers, Nigel (avowed Sci-Fi nut)
The 'Worldcon' returns to the UK next year.   HURRAH!