[pasbesoin]

Clarke's "The City and the Stars"

Technologically enabled immortality (in an interesting manner).

Massive, crystalline data storage.

Immersive gaming, including the negative, subsuming aspects of same.

The individual as radical.

The radical as an essential component of long-term planning and viability.

[nurettin]

It seems the sci-fi trend for huge data storage back then was "crystals!". So were many of remote viewing devices, alien navigation systems and space fuel.

[pasbesoin]

A comment on another thread, made about a day after my GP comment, mentioned an influential paper published in, IIRC, 1944 speculating on crystalline storage of complete human genetic information. (I'm assuming this would encompass a pre-double-helix understanding/conception of said data.)

That would tie into Clarke's story well (originally in several forms, that got consolidated into "The City and the Stars" with a 1952 copyright. And he would have been in a position (scientifically active) to have encountered it.

I don't know that any such thing happened. But, it was an interesting coincidence to run across that comment. (Sorry, I don't have it to hand.)

[Memosyne]

Maybe we have yet to fully explore the potential of that idea? https://en.wikipedia.org/wiki/5D_optical_data_storage