In the U.S., as recently as the early 1970's, homosexuals were considered mentally ill. Watch this clip, in which a board-certified psychiatrist, 'Dr. Anonymous', at a 1972 American Psychiatric Association conference, announces "I'm a homosexual, I am a psychiatrist." See how, over the decades, and as defined by the APA, the boundaries shifted between the so-called ill and the so-called healthy.