Presidential address. In praise of skepticism.
D002170:Canada; D003431:Cross-Cultural Comparison; D005602:France; D005858:Germany; D006115:Greece; D049673:History, 20th Century; D049690:History, Ancient; D006801:Humans; D001523:Mental Disorders / Q000145:classification / Q000453:epidemiology*; D011570:Psychiatry / Q000266:history / Q000639:trends*; D014586:USSR; D014481:United States