In addition to being a source of profound suffering, schizophrenia is the most enigmatic of afflictions. The many hypotheses that have been adduced for the plethora of bewildering behaviors it engenders, include preoedipal regression or fixation, impaired ego boundaries, or both; impaired “attentional filters; overconcreteness and overabstraction; over- and underinclusiveness; and various neurobiological models. Despite their obvious differences, as Sass points out, all these theories follow the 19th-century tradition of Hughlings Jackson and Emil Kraepelin; they interpret schizophrenia