Research on the nature and treatment of schizophrenia has undergone a revival and metamorphosis in the last decade. For a long while, the field had been moribund, weighed down by an unreliable diagnostic system, pessi- mism about the possibility of new discoveries, and a dearth of research funds. A number of factors have seemingly coalesced to change this situa- tion, with the result that the field is now alive with excitement and optimism. Four factors...