Columbia subject headings:
Africa--Economic conditions--21st century.
Africa--Politics and government--21st century.
Africa--Social conditions--21st century.
Harvard subject headings:
Africa, Sub-Saharan--Economic conditions--21st century.
Africa, Sub-Saharan--Politics and government--21st century.
Political stability--Africa, Sub-Saharan--21st century.
Princeton subject headings:
Africa, Sub-Saharan.