Earlier quoted context omitted.
I read Isaac Asimov’s foundation series a few years ago (side note for anyone who hasn’t read it: it still holds up incredibly well with a small suspension of disbelief and some grace for when it was written). In the preface to the 4th or 5th book (which were written 30+ years after the “original” trilogy) he discussed how the originals parts of the trilogy were published as a set of short stories in a SciFi publicat…
Weird. I bounced off Foundation immediately because it felt like a series of short stories instead of a novel (and also I couldn't take psychohistory the least bit seriously). I'm kind of kicking myself for not predicting that it actually did start that way.
Regarding psychohistory: It's worth considering the era in which the books where written. The 1st half of the 20th century saw massive innovations in economic theory, physics, and information theory. It was not a big leap to predict that in 500 years time, humans would further advance macro economics. Personally I felt the books did a great job setting limits in the capabilities of the theory, and using its inherit flaws to drive interesting plot lines.