History 30 Civilization 16 Relations 12 Economic conditions 11 Politics and government 11 Colonies 8 Indians, Treatment of 7 more ... Commerce 6 Foreign relations 6 Housing 6 International relations 6 Pan-Americanism 6 Discoveries in geography 5 Discovery and exploration 5 Economic policy 5 Spanish 5 Historiography 4 Philosophy 4 Philosophy, Latin American 4 Description and travel 3 Land tenure 3 Social security 3 Theater 3 Administration 2 Agriculture 2 Architecture 2 Art 2 City planning 2 Civilization, Hispanic 2 Communism 2 less ...