History 20,969 Politics and government 5,720 Description and travel 4,372 Histoire 4,050 Social life and customs 3,565 Social conditions 2,990 Antiquities 2,400 more ... Manners and customs 1,576 Race relations 1,560 Civilization 1,492 Economic conditions 1,384 African Americans 1,352 Frontier and pioneer life 1,352 Indians of South America 1,330 Travel 1,308 Foreign relations 1,281 Indians of Mexico 1,172 Politique et gouvernement 1,141 Ethnic relations 886 Indians of North America 874 Mayas 856 Conditions sociales 764 Descriptions et voyages 741 Relations 667 International relations 631 Social aspects 586 Excavations (Archaeology) 575 Discovery and exploration 552 Emigration and immigration 549 Mœurs et coutumes 543 less ...