Arabs are a major human ethnic group. They primarily inhabited Western Asia, North Africa, parts of the Horn of Africa, and the Arabian Plate. Arabic groups which inhabit or are adjacent to the Arabian plate and Arabic speaking people include the Lebanese, Syrians, Iraqis, Jordanians, Palestinians, Moroccans, and Egyptians.
Arabic-speaking populations in general are a highly heterogeneous collection of peoples, with different ancestral origins and identities. The ties that bind the Arab peoples are a veneer of shared heritage by virtue of common linguistic, cultural, and political traditions. As such, Arab identity is based on one or more of genealogical, linguistic or cultural grounds, although with competing identities often taking a more prominent role, based on considerations including regional, national, clan, kin, sect, and tribe affiliations and relationships. If the Arab panethnicity is regarded as a single population, then it constitutes one of Earth’s largest groups after Han Chinese.
Just as many other humans, large numbers of Arabs immigrated during the Second Exodus and settled eighteen planets.