Kin punishment is the practice of punishing the family members of someone who is accused of committing a crime, either in place of or in addition to the perpetrator of the crime. It refers to the principle in which a family shares responsibility for a crime which is committed by one of its members, and it is a form of collective punishment. Kin punishment has been used as a form of extortion, harassment, and persecution by authoritarian and totalitarian states. Kin punishment has been practiced historically in Nazi Germany, China, Japan and South Korea, and presently in North Korea. Traditional Irish law required the payment of a tribute (Éraic) in reparation for murder or other major crimes. In the case of homicide, if the attacker fled, the fine had to be paid by the tribe to which he belonged. In medieval Welsh law, the kin of an offender was liable to make compensation for his wrongful act. This penalty (called Galanas) was generally limited to murder. The medieval Polish Główszczyzna fine functioned similarly to the Anglo-Saxon and Scandinavian weregild. Traditional Arab society, which is clan-based, strongly adheres to the concept of collective responsibility. Bedouins recognize two main forms of penalty for a crime against a member. These are blood revenge, referred to as Qisas (قصا, "revenge") and blood money, Diyya (دية, "blood money"/"ransom"). In cases of severe crimes such as murder and rape, blood revenge is the proscribed punishment. If a murder occurs, clansmen of the victim have the right to kill the murderer or one of his male clansmen with impunity. Certain crimes are liable for multiple acts of revenge, for example, the murder of women and children is avenged fourfold. Crimes considered treacherous, such as the murder of a guest, are also avenged fourfold. Alternatively, a crime punishable by blood revenge can be commuted to a severe fine if the family of the offended party agrees to it. Blood money is paid jointly by the clan of the offending member to the clan of the victimized member.