The Arab–Israeli conflict is the phenomenon involving political tension, military conflicts, and other disputes between various Arab countries and Israel, which escalated during the 20th century. The roots of the Arab–Israeli conflict have been attributed to the support by Arab League member countries for the Palestinians, a fellow League member, in the ongoing Israeli–Palestinian conflict; this in turn has been attributed to the simultaneous rise of Zionism and Arab nationalism towards the end of the 19th century, though the two national movements had not clashed until the 1920s.

The Arab world, formally the Arab homeland, also known as the Arab nation, the Arabsphere, or the Arab states, comprises a large group of countries, mainly located in Western Asia and Northern Africa. While the majority of people in the Arab world are ethnically Arab, there are also significant populations of other ethnic groups such as Berbers, Kurds, Somalis and Nubians, among other groups. Arabic is used as the lingua franca throughout the Arab world.