[1] The term includes conflicts, riots and other forms of violence between communities of different religious faith or ethnic origins.
[2] United Nations Office on Drugs and Crime includes any conflict and form of violence between communities of different religious groups, different sects or tribes of same religious group, clans, ethnic origins or national origin as communal violence.
[20] In 1572, thousands of Protestants were killed by Catholics during communal violence in each of the following cities – Paris, Aix, Bordeaux, Bourges, Lyon, Meaux, Orleans, Rouen, Toulouse, and Troyes.
Nigeria has seen centuries of communal violence between different ethnic groups particularly between Christian south and Islamic north.
The violent groups were Arabs and Africans, that expanded along religious lines, and the communal violence ultimately led to the overthrow of the Sultan of Zanzibar.
[34] Communal conflicts between religious communities in India, especially Hindus and Muslims have occurred since the period of British colonial rule, occasionally leading to serious inter-communal violence.
British historians have attributed the cause of the partition to the communalism of Jinnah and the political ambitions of the Indian National Congress.
[41] In Indian subcontinent, numerous 18th through 20th century records of the British colonial administration mention communal violence between Hindus and Muslims, as well as Sunni and Shia sects of Islam, particularly during processions related to respective religious celebrations.
[42][43] The frequency of communal violence in South Asia increased after the first partition of Bengal in 1905, where segregation, unequal political and economic rights were imposed on Hindus and Muslims by Lord Curzon, based on religion.
[44] In 1919, after General Dyer ordered his soldiers to fire on unarmed protestors inside a compound in Amritsar, killing 380 civilians, communal violence followed in India against British migrants.
[12][50] The Indian law defines communal violence as, "any act or series of acts, whether spontaneous or planned, resulting in injury or harm to the person and or property, knowingly directed against any person by virtue of his or her membership of any religious or linguistic minority, in any State in the Union of India, or Scheduled Castes and Scheduled Tribes within the meaning of clauses (24) and (25) of Article 366 of the Constitution of India" [51] In Indonesia, communal violence is defined as that is driven by a sense of religious, ethnic or tribal solidarity.
[54] Colm Campbell has proposed, after studying the empirical data and sequence of events during communal violence in South Africa, Palestinian Territories and Northern Ireland, that communal violence typically follows when there is degradation of rule of law, the state fails to or is widely seen as unable to provide order, security and equal justice, which then leads to mass mobilization, followed by radicalization of anger among one or more communities, and ultimately violent mobilization.
[59] Integration and the resultant positive interethnic contact reduces prejudice by allowing individuals to correct false beliefs about members of other ethnic groups, improving intergroup relations consequently.