Columbia subject headings:
Arab countries--Politics and government--21st century.
Middle East--Politics and government--21st century.
Shīʻah--Relations--Sunnites.
Sunnites--Relations--Shīʻah.
Harvard subject headings:
Islam.
Middle East--Politics and government--Congresses.
Shīʻah.
Sunnites.
Princeton subject headings:
Arab countries--Politics and government--21st century.
Middle East--Politics and government--21st century.
Shīʻah--Relations--Sunnites.
Sunnites--Relations--Shīʻah.