Congresses 1,622 History 945 Politics and government 544 History and criticism 479 Economic conditions 475 Social conditions 448 Indians of South America 331 more ... Economic policy 315 Antiquities 256 Criticism and interpretation 239 Education 198 Civilization 196 Women 183 Economic aspects 166 Social aspects 165 Economic integration 159 Social policy 137 Democracy 133 Agriculture 120 Indians of Mexico 119 Foreign relations 118 Government policy 102 Latin American literature 101 Foreign economic relations 100 Human rights 95 Social security 95 Spanish American literature 90 Political activity 89 Indians 88 Rural development 86 less ...