Ken Kesey was an American author and counterculture figure known for his novel 'One Flew Over the Cuckoo's Nest' and for his role in the 1960s counterculture movement. His work often explored themes of individuality, authority, and social conformity, reflecting the spirit of rebellion that characterized the era. Kesey's life and writings were heavily influenced by his experiences with psychedelics and his involvement with a group known as the Merry Pranksters, who famously embraced experimentation and communal living.