the 'psychohistory' in Foundation is pretty much a thinly veiled version of historical materialism, at least that's the way it came off to me

just be prepared for some somewhat boring character interactions.

he's a better world builder then dialog crafter, as is true in much sci-fi from that era. more his early stuff then later

his wife wrote some stuff in his universe after he died and i think she did characters/dialog so much better. i suspect she helped him in his later works (which is super cool some of the best writing comes from couples collaborating)