I have my doubts about your theory.If the general non P.D community was polled how many would say they had a stressful early life?Are there more cases of P.D in communities that have experienced war in the time before or after birth of a certain age group?One has to be very careful not to do what has been done by some well respected great and good pyschologists (I only know about them as child pyschology is my field) and make the facts fit the theory