In the 15th century, a rich inheritance could be a liability rather than an asset. An unfortunate heiress could be imprisoned by predatory relatives wanting control of her lands. Marriages made for the purpose of enlarging inheritances could become a form of imprisonment. Inheritance conflicts, in or out of court, could drag on or turn violent.
This approach is further hampered by the continually changing nature of modem psychology. Due to alterations in the criteria used for diagnoses, terms and illnesses become obsolete, thus negating our previous theories.