Mediation is deeply rooted in Greek tradition: In antiquity, Greek free citizens deployed educated slaves (therapes) to assist them in negotiations by conveying confidential offers and counter-offers between them. On the island of Crete, an assisted and confidential negotiation between families, called sasmos, has been practiced non-stop from the 12^th century B.C. until today, to prevent or settle vendettas (crimes committed in order to defend family honor, in accordance with ancient local customs). When a settlement is reached between two families involved in a sasmos process, with the assistance of a local mediator called sastis, despite the informality of the process and lack of legal enforcement, the agreement is considered binding by the parties and the local community.