Postmodernism originated in an overreaction to “modernist” sociocultural trends of the past few centuries. Flaws of postmodern writers include: ignorance and distortion of the history of science and philosophy; the erroneous assumption that such faults of some natural scientists as reductionism and narrowness are intrinsic to the entire enterprise, even to rationality; overgeneralizing such valid criticisms to the level of metaphysical relativism; and deliberately obscure and pretentious writing. Its vogue is a threat to science in general and to psychoanalysis in particular. Psychoanalysis was vulnerable to a postmodernist attack because of Freud's rejection of scientific standards for his creation, his naïve realism, and his authoritarian heritage plus certain weaknesses of theory, technique, and organization resulting from it. Analysts are urged to stay close to clinical observation and abstain from generalizing outside their realm of expertise.