A feud () is a long-running argument or fight between parties—often, through guilt by association, groups of people, especially families or clans. Feuds tend to begin because one party (correctly or incorrectly) perceives itself to have been attacked, insulted or wronged by another. A long-running cycle of retaliation, often involving the original parties' family members and/or associates, then ensues. Feuds can last for generations. == Blood feuds/vendetta ==A blood feud is a feud with a cycle of retaliatory violence, with the relatives of someone who has been killed or otherwise wronged or dishonored seeking vengeance by killing or otherwise physically punishing the culprits or their relatives. Historically, the word vendetta has been used to mean a blood feud. The word is Italian, and originates from the Latin vindicta, "vengeance." In modern times, the word is sometimes extended to mean any other