Historians have long puzzled over the apparent mental instability of great and terrible leaders alike: Napoleon, Lincoln, Churchill, Hitler, and others.
Types of mental illness
mood disorders (such as depression or bipolar disorder)
psychotic disorders (such as schizophrenia)
trauma-related disorders (such as post-traumatic stress disorder)
substance abuse disorders.
Acute stress disorder
Adolescent antisocial behavior
Adult antisocial behavior
Alice in wonderland syndrome
Antisocial personality disorder