A feud is a prolonged and often bitter conflict between individuals, families, or groups. These disputes can arise from various issues, such as personal grievances, competition, or historical disagreements. Feuds can escalate over time, leading to ongoing hostility and sometimes even violence. Feuds are commonly seen in literature and history, with famous examples including the Montagues and Capulets from Shakespeare's "Romeo and Juliet" and the Hatfields and McCoys in American folklore. They can have significant social implications, affecting relationships and communities, and may take years or generations to resolve.