Psi Fi?

Psi powers — telepathy, telekinesis, precognition, and other parapsychological activity — was one of the founding tropes of science fiction, up there with rocket ships, time travel, and aliens. John W. Campbell coined the term “psionics” — from psi and electronics — and encouraged his stable of authors to write about it. And so they did.

But after reaching maximum saturation in the 1950s, psionics began disappearing from SF in the 70s, became uncommon by the 90s, and are a rarity today.

— Daryl Gregory, 5 Books About Psi Powers,

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