Frank Herbert's son has written a biography of his father titled Dreamer of Dune. Here's a bit about Herbert's novel The Santaroga Barrier.

In 1966, Dad was working on a new novel, The Santaroga Barrier- about an unusual, insular northern California town. The book had a framework based upon the thinking of the German philosopher Martin Heidegger. In his classic 1927 work, Sein und Zeit, Heidegger presented a theory of man's existence in the world, which he called "dasein." The protagonist of The Santaroga Barrier was Gilbert Dasein. His girlfriend was Jenny Sorge, and in the Heideggerian view, "sorge" represented "care"-things that were within the care of mankind or dasein. Heidegger believed that man became disoriented and drowned himself in the vastness of the world and in the minutiae of following society's rules. Each man's experiences were too small, too parochial, for him to develop a proper philosophy of existence.

I found the novel a bit diappointing because, rather than the Santarogans being exceptional because they have overcome Cartesian metaphysics, they instead owe their special qualities to a psychedelic from their food cooperative, the coop and drug are both called Jaspers no less. Apparently the drug boosts your confidence, makes you feel more social, dehydrates you, leaves you with a nasty hangover, and is addictive. I guess science fiction writers hadn't yet got around to experimenting much way back in 1966, and were somewhat unclear on the difference between psychedelics and beer.  ¶ 12:28 PM