Columbia subject headings:
Hegemony--China.
Hegemony--Iran.
Hegemony--Russia (Federation)
United States--Foreign relations--21st century.
Harvard subject headings:
Hegemony--China.
Hegemony--Iran.
Hegemony--Russia (Federation)
United States--Foreign relations--21st century.
Princeton subject headings:
Hegemony--China.
Hegemony--Iran.
Hegemony--Russia (Federation).
United States--Foreign relations--21st century.