My theoretical views have developed in the study of the family as an emotional system, and the extension of those concepts into larger social systems (this is not to be confused with general systems theory). The main body of psychiatric thinking is based on individual theory which is less comprehensive than a systems approach. I have long opposed psychiatrists’ tendency to extend partial theory into global explanations. The same reservations and cautions also apply to an extension of systems theory beyond specific knowledge. I believe that premature extension of theory closes a mind to new obvious facts, and it lulls the psychiatrist into believing he has knowledge he does not have. With tentative reservation, I occasionally indulge in enough broad systems theorizing to have a few ideas. I believe a systems theory is superior to current individual theory in explaining the human phenomenon. Most psychiatrists, who think in terms of individual theory, probably would not agree with this. No single piece of systems thinking will fit neatly into conventional theory. It is necessary to establish a new theoretical framework and this is a monumental task.