History Politics and government 20 Description and travel 10 Social conditions 9 Indians of South America 8 Motion pictures 7 Social aspects 7 more ... Discovery and exploration 6 Political activity 6 Architecture 5 City planning 5 Emigration and immigration 5 Human rights 5 Political aspects 5 Spanish 5 Antiquities 4 Excavations (Archaeology) 4 Explorers 4 Indians of North America 4 Political violence 4 Travel 4 Urbanization 4 Disappeared persons 3 Economic conditions 3 Education 3 Government relations 3 History and criticism 3 Intellectual life 3 Land tenure 3 Peronism 3 less ...