Ancestor worship refers to certain beliefs and practices of families with regard to ancestors who have been dead for many years. In some cultures, deceased ancestors are worshiped as gods. Such worship may involve rituals performed at a shrine decorated with objects that symbolize the ancestor. In many cultures, people believe that the spirits of ancestors are angered by violations of law or custom, and they use rituals to pacify them. These rituals commonly include offerings of food and other items. Ancestor worship forms a part of many religions, especially in Asia and Africa. In general, it serves to uphold the authority and honor of elders, to keep the family together, and to maintain the society’s traditions.