Sci-Fi Book Club: Stranger in a Strange Land by Robert A. Heinlein
Originally published in 1961, Stranger in a Strange Land was regarded as radical for its ideas about love, sexuality, and religion. The titular stranger is a young man raised from infancy by Martians following the crash landing which killed his parents and the rest of an exploratory team from Earth. Baffled by human prejudice and social mores, Smith founds his own church which teaches Martian ways—delivering a blow to the foundation of human society.