Algeria
Islam is the predominant religion in Algeria, with its adherents, mostly Sunnis, accounting for 99% of the population according to a 2012 CIA World Factbook estimate, and 97.9% according to Pew Research in 2010. There are about 150,000 Ibadis in the M'zab Valley in the region of Ghardaia.
History of Algeria
The Almoravid ("those who have made a religious retreat") movement developed early in the 11th century among the Sanhaja Berbers of southern Morocco. The movement's initial impetus was religious, an attempt by a tribal leader to impose moral discipline and strict adherence to Islamic principles on followers. But the Almoravid movement shifted to engaging in military conquest after 1054. By 1106, the Almoravids had conquered the Maghreb as far east as Algiers and Morocco, and Spain up to the Ebro River.