Columbia subject headings:
Harvard subject headings:
Conflict management.
International relations--History--20th century
International relations--History--21st century
Princeton subject headings:
Civilization--21st century.
Conflict management--History--21st century.
Culture conflict--History--21st century.
Ethnic conflict--History--21st century.
International relations--History--20th century.
International relations--History--21st century.
War and civilization--History--21st century.