History 13,973 Politics and government 4,187 Social aspects 2,477 Social conditions 2,408 Foreign relations 2,380 History and criticism 2,046 African Americans 2,021 Presidents 1,767 Race relations 1,761 Political aspects 1,589 Law and legislation 1,515 Education 1,454 Government policy 1,345 Economic conditions 1,221 Civil rights 1,087 Women 1,014 Research 977 Prevention 862 American literature 787 Study and teaching 785 Medical care 765 Economic aspects 762 Emigration and immigration 710 Racism 691 Social life and customs 613 Intellectual life 584 Influence 580 World War, 1939-1945 575 Political activity 573 Civilization 555 Evaluation 522 Religious aspects 522 Public opinion 520 Services for 516 Philosophy 515 Universities and colleges 512 Election 503 Motion pictures 499 Minorities 496 Education, Higher 494 Immigrants 487 Gender identity 486 Legal status, laws, etc 474 Moral and ethical aspects 474 Slavery 472 Civil rights movements 470 Relations 467 Religion 465 Criticism and interpretation 454 Psychological aspects 454 Popular culture 449 Economic policy 434 Study and teaching (Higher) 428 National security 425 Finance 424 Management 405 Feminism 399 Psychology 399 Terrorism 398 Employment 395 Standards 391 Military policy 386 history 382 Campaigns 381 Ethnic relations 372 Youth 369 Vietnam War, 1961-1975 358 Democracy 356 Political and social views 348 Soldiers 348 Science 346 Armed Forces 340 Technological innovations 336 Educational change 324 Attitudes 323 American fiction 322 Jews 321 English language 320 Political culture 320 Environmental aspects 319 Medical policy 309 Race identity 304 Children 303 Indians of North America 303 Law 303 Elections 291 Church history 290 Teachers 290 Veterans 289 Youth development 285 Delivery of Health Care 284 Training of 282 Cold War 273 Rhetoric 273 Constitutional law 272 Women and literature 269 Ethnic identity 268 Educational equalization 259 Administration 257 Antislavery movements 257