Ostracism

Ostracism was a procedure under the Athenian democracy in which any citizen could be expelled from the city-state of Athens for ten years. While some instances clearly expressed popular anger at the victim, ostracism was often used pre-emptively. It was used as a way of defusing major confrontations between rival politicians (by removing one of them from the scene), neutralizing someone thought to be a threat to the state, or exiling a potential tyrant. Crucially, ostracism had no relation to the processes of justice. There was no charge or defence, and the exile was not in fact a penalty; it was simply a command from the Athenian people that one of their number be gone for ten years.