" Did you ever read that story about the man who traveled to the future and found everyone there insane? Everyone. But since they were all insane they didn't know they were all insane. They all acted alike and so they thought themselves normal. And since our hero was the only sane one among them, he was abnormal; therefore, he was the insane one. To them, at least. Yes, Mr. Douglas, insanity is relative. It depends on who has who locked in what cage. "

― Ray Bradbury , A Sound of Thunder and Other Stories