Baldwin gives the following case involving cooperation : " Animals may be kept alive let us say in a given environment by social cooperation only; these transmit this social type of variation to posterity; thus social adaptation sets the direction of physical phylogeny and physical heredity is determined in part by this factor " ( Baldwin, 1896, p . 553 ).
22.
Symptoms referred to as part of the " negative axis " included pessimism, poor social adaptation, and conflict with authorities, and were themselves sufficient for a formal diagnosis of " sluggish schizophrenia with scanty symptoms . " According to Snezhnevsky, patients with sluggish schizophrenia could present as quasi sane yet manifest minimal but clinically relevant personality changes which could remain unnoticed to the untrained eye.
