More Than Human holds up surprisingly well.

Because it is set mostly in its own time and is not based on technology, we are spared the wrenching anachronisms of a future as imagined by an author in the early 50s.

There is no attempt to explain the mechanism behind the abilities of the post humans, there is a MacGuffin but it is indistinguishable from magic.

There is some psychology that felt credible if sometimes simplistic to me, though I am no expert.

The main thing I liked was that a Novel published in 1953 managed to subvert my 2021 expectations.

The appearance of super humans did not result in a super hero scenario, they are neither hated nor revered, they keep to themselves, on the sidelines, trying to survive, trying to understand themselves and their relationship to old humanity.

For most of the Novel there are more questions than answers, yet again helping the modern reader in avoiding anachronisms. It is when answers are given that the crudeness of 1950s sci-fi creeps in.

Some of the side characters are cartoonish.

I am glad I stumbled upon this title on the Audible Plus catalog. I don't think I'd have read this novel otherwise.