Social conditions -- Economic conditions -- 11 Politics and government -- 5 Social indicators -- 3 Social prediction -- 3 Economic conditions 2 Statistics 2 more ... 21st century 1 Civilization -- 1 Congresses 1 Congresses -- 1 Equality -- 1 Forecasts 1 Income distribution -- 1 Military policy -- 1 National characteristics, American 1 Public opinion -- 1 Quality of life -- 1 Social aspects -- 1 Social conditions 1 Twentieth century -- 1 less ...