History 26.704 Politics and government 10.254 Foreign relations 6.579 African Americans 6.370 Indians of North America 5.420 Histoire 4.235 Race relations 4.088 mehr ... Social conditions 3.975 Presidents 3.366 Politique et gouvernement 2.401 Civilization 2.358 Social life and customs 2.276 Campaigns 2.106 Civil rights 1.814 Diplomatic relations 1.744 Publications about Graduates 1.725 Relations extérieures 1.660 Noirs américains 1.628 Slavery 1.608 Antiquities 1.486 Generals 1.360 Description and travel 1.294 Social aspects 1.259 Government relations 1.205 Economic conditions 1.176 Regimental histories 1.147 Political aspects 1.100 Ethnic relations 1.033 Racism 934 Intellectual life 932 weniger ...