Social conditions Economic conditions 1.142 Politics and government 676 History 593 Women 219 Working class 114 Social life and customs 108 Social classes 102 Social problems 93 Civilization 92 Case studies 90 Description and travel 84 Economic policy 77 Race relations 74 Poor 73 Congresses 70 Biography 62 Education 60 Population 60 Social change 60 Cities and towns 59 Social policy 53 Communism 50 Families 50 African Americans 45 Industries 44 Socialism 43 Sociology 43 Periodicals 42 Social history 42