In Athenian politics, it was important to be good at debating. If you were, you were likely to get people to vote your way. The Athenians did not want any one person to
have too much political influence. It would stop things being democratic. Their way of stopping this was simple.
Each year, there was a chance to vote to ostracise someone as ‘a danger to the state'. An ostracised citizen had to leave the city state for ten years. Everyone wrote the name of someone they wanted ostracised on a piece of broken pottery (an ostrakon). If over 6000 votes were cast, the person whose name was on most ostraka had to leave.