History 100 Social conditions 84 Economic conditions 34 Civilization 26 Politics and government 21 Social life and customs 21 Intellectual life 20 Race relations 16 African Americans 15 Social aspects 14 Emigration and immigration 13 Progressivism (United States politics) 12 Cities and towns 9 History and criticism 9 Political aspects 9 Reconstruction (U.S. history, 1865-1877) 9 World War, 1914-1918 9 American literature 8 Rural-urban migration 8 Industrialization 7 Influence 7 National characteristics, American 7 Women 7 Capitalism 6 Economic aspects 6 Working class 6 Railroad travel 5 Social reformers 5 African American leadership 4 African American women 4 Businesspeople 4 Description and travel 4 Immigrants 4 Industrial relations 4 Middle class 4 Popular culture 4 Public opinion 4 Abolitionists 3 Antislavery movements 3 Civil rights 3 Cultural pluralism 3 Employment 3 Lynching 3 National characteristics, American, in literature 3 Political and social views 3 Social classes 3 Social problems 3 Travel 3 Chinese Americans 2 Citizenship 2 Degeneration 2 Diversity 2 Education 2 Ethnicity in literature 2 Eugenics 2 Foreign relations 2 Freed persons 2 Gender identity 2 Historiography 2 Industrial revolution 2 Industrialists 2 Labor movement 2 Leadership 2 Masculinity 2 Minorities 2 Minority authors 2 Nineteen tens 2 Political activists 2 Political activity 2 Pragmatism 2 Racism 2 Railroad construction workers 2 Railroads 2 Recruiting and enlistment 2 Relations 2 Rhetoric 2 Science 2 Sex role 2 Sharecropping 2 Women social reformers 2 Writing skill 2 history 2 Abnormalities, Human 1 Acculturation 1 Adventure and adventurers 1 African American men 1 Age groups 1 Agriculture 1 Appreciation 1 Armed Forces 1 Art, American 1 Arts, American 1 Attitudes 1 Authenticity (Philosophy) 1 Authors, American 1 Bars (Drinking establishments) 1 Breweries 1 British 1 Business and politics 1 Businessmen 1