While Kim Jong Un stares down his enemies abroad, it's easy to forget that he's also fighting a battle from within his own borders: to survive at all costs. Like any autocratic leader, he's under constant pressure to maintain order and allegiance. But his youth and inexperience make staying in power that much more of a challenge, which in turn requires absolute control. Opposition must be eliminated. No one is safe, not even his own family.
Read MoreNew York Times Op-Ed: North Korea's Palace Intrigue →
After the 14th-century Korean ruler Taejo, founder of the Joseon dynasty, chose the youngest of his eight sons to succeed him, a spurned son killed the heir apparent and at least one of his other half brothers and eventually rose to the throne. Today, rumors of royal fratricide are again swirling, this time around the court of Kim Jong-un, the ruler of North Korea.
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