History -- 52 History 32 History, Modern -- 32 Politics and government -- 20 World politics -- 15 Civilization, Modern -- 14 Politics and government 11 more ... Military history, Modern -- 10 Civilization -- 8 Economic conditions 8 Economic conditions -- 6 Social conditions -- 6 Civilization 5 Encyclopedias 4 Foreign relations -- 4 Islam -- 4 Nationalism -- 4 Philosophy 4 Revolutions -- 4 War and civilization -- 4 20th century 3 Biography -- 3 Ch'ing dynasty -- 3 Civilization, Modern 3 Cold War 3 Economic policy 3 Foreign relations 3 History, Modern 3 Military history, Modern 3 Social conditions 3 less ...