""If I hadn’t spent so much time studying Earthlings," said the Tralfamadorian, "I wouldn’t have any idea what was meant by 'free will.' I've visited thirty-one inhabited planets in the universe, and I have studied reports on one hundred more. Only on Earth is there any talk of free will." (p. 86)"
January 1, 1970
https://en.wikiquote.org/wiki/Slaughterhouse-Five