At the start of the 21st century, Mosul and its surroundings had an ethnically and religiously diverse population; the majority of Mosul's population were Arabs, with Assyrians, Armenians, Turkmens, Kurds, Yazidis, Shabakis, Mandaeans, Kawliya, Circassians in addition to other, smaller ethnic minorities. In religious terms, mainstream Sunni Islam was the largest religion, but with a significant number of followers of the Salafi movement and Christianity (the latter followed by the Assyrians and Armenians), as well as Shia Islam, Sufism, Yazidism, Shabakism, Yarsanism and Mandaeism.