1984 by Orwell
... Tragedy, he perceived, belonged to the ancient time, to a time when there was still privacy, love, and friendship, and when the members of a family stood by one another without needing to know the reason.
.... Privacy, he said, was a very valuable thing. Everyone wanted a place where they could be alone occasionally. And when they had such a place, it was only common courtesy in anyone else who knew of it to keep his knowledge to himself.