
"Computer Lib/Dream Machines" Theodor Nelson - a vision of a better computing future that sticks with me.
"Courtship Rite", "The Moon Goddess and the Son", "Psychohistorical Crisis" Donald Kingsbury - sociologicaly based SF that forced me to think way outside of my cultural assumptions. TMGATS is particularly relevant given the events in Ukraine.
The Earth Abides, by George Stewart. Story is set in Berkeley, CA after a disease kills most life on earth, maybe a little too on the nose these days...
Paolo Bacigalupi's short stories (e.g. Pump Six), some of which he later turned into longer books.
Courtship Rite, by Don Kingsbury. Plot is kind of bland but the worldbuilding is fantastic, essentially an attempt to create a world where cannibalism isn't immediately though of as an ultimate evil, which leads to odd implications for society.
