Is the origin of emotional problems organic or environmental?
Current research with monozygotic twins that have been separated at birth suggests that the answer lies in an extremely complex interaction between certain organic ––genetic or epigenetic–– factors, and the environment. The more serious the emotional problems, the more it seems that there may exist certain predispositions towards that pathology. A predisposition is not determining and only results in pathological development if it is combined with an unfavorable environment.