Economic conditions -- Social conditions -- Politics and government -- 4 Foreign relations -- 2 Social indicators -- 2 Social prediction -- 2 Case studies 1 more ... Case studies -- 1 Equality -- 1 Forecasts 1 Income distribution -- 1 National security -- 1 Public opinion -- 1 Social aspects -- 1 Social sciences -- 1 Study and teaching (Higher) -- 1 Twentieth century -- 1 less ...