Other viewpoints include those of Hans Eysenck, who writes in "Decline and Fall of the Freudian Empire" (1985) that Freud set back the study of psychology and psychiatry "by something like fifty years or more", and Malcolm Macmillan, who concludes in "Freud Evaluated" (1991) that "Freud's method is not capable of yielding objective data about mental processes". Morris Eagle states that it has been "demonstrated quite conclusively that because of the epistemologically contaminated status of clinical data derived from the clinical situation, such data have questionable probative value in the testing of psychoanalytic hypotheses". Richard Webster, in "Why Freud Was Wrong" (1995), described psychoanalysis as perhaps the most complex and successful pseudoscience in history. Crews believes that psychoanalysis has no scientific or therapeutic merit.