The volume contains the proceedings of a research conference supported by the Foundation's Fund for Research in Psychiatry, June 1967. It contains 28 separate papers, a foreword, a summary, and an author-index. In the forword the editors indicate that they have used the word "transmission" instead of etiology because the concern today is not on immediate and specific causes, but how schizophrenic disorders are passed on to members of a family, class, or culture. The general thesis is that hereditarians or those adhering to the genetic point of view and the environmentalists who consider that life experiences are more significant, are not antagonistic. Each side concedes the importance of the other and the hereditaryenvironment controversy should by now be laid to rest. A transactional frame of reference leads to the abandonment of "either/ or" and the recognition of a system whose parts are all necessary to develop