[anovikov]

Except kings very frequently died for "good" reasons: being killed in battle, or by political opponents, or during hunting accidents, or victims of coups, or beheaded. As a leader, you lead your subjects into all kinds of battles and take all kinds of risks and today's politicians don't do that anymore.

[IAmBroom]

Richard II starved to death. Voluntarily. After signing over his crown to someone he had previously banished. While in prison.