History 487 Indians of North America 274 Social conditions 93 Social aspects 83 Emigration and immigration 68 History and criticism 63 Antiquities 47 more ... Free trade 44 Ethnic relations 43 Social life and customs 42 Ethnic identity 41 Politics and government 39 Indians, Treatment of 36 American literature 34 Discovery and exploration 33 Economic aspects 33 Colonization 32 Political aspects 32 Race relations 32 Religion 32 Economic conditions 31 Mexican Americans 31 Colonies 30 Ecology 29 Travel 28 Economic integration 27 Histoire 26 Indian philosophy 26 Intellectual life 26 Indigenous peoples 25 less ...