Subject
- Government policy42
- Religious aspects40
- Nationalism39
- Christianity37
- National security36
- Philosophy33
- Civilization, Medieval31
- Influence29
- World War, 1939-194529
- Languages28
- Colonies27
- Historiography27
- Social life and customs27
- Women27
- History, Military26
- North Atlantic Treaty Organization26
- Antiquities25
- International relations23
- Religion23
- Democracy22