What goes into making someone become a cult leader?
Cult leaders are notoriously people suffering from Narcissistic Personality Disorder. Clearly, not all people with NPD are cult leaders, but all damaging cult leaders are NPDs. How do they get that way? Is it nature or nurture.
What goes wrong that creates a Jim Jones or David Koresh out of someone who outwardly is so glib and charismatic? What are the other traits that combine with Narcissism to turn an otherwise extremely bright, attractive person into someone who wreaks so much havoc in the lives of those who follow them?