History -- 20 Foreign relations -- 15 History 11 Politics and government -- 10 Biography -- 7 Juvenile literature -- 7 Civilization -- 6 more ... Presidents -- 5 Antiquities 4 Indians of North America 4 Race relations 4 Archaeology 3 Campaigns -- 3 Excavations (Archaeology) 3 Histo -- 3 Histor -- 3 Legislators -- 3 Officials and employees 3 Philosophy 3 Social conditions 3 United States -- 3 African Americans 2 Biograp -- 2 Biograph -- 2 Biography 2 Civilization 2 Decision making 2 Ethnic relations 2 Foreign relations 2 General -- 2 less ...