Ostracism

Ostracism (Greek: ὀστρακισμός, ostrakismos) was an Athenian democratic procedure 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 citizen, ostracism was often used preemptively. It was used as a way of neutralizing someone thought to be a threat to the state or a potential tyrant, though in many cases popular opinion often informed the expulsion. The word "ostracism" continues to be used for various forms of shunning.