Progress 46 Civilization 9 Politics and government 9 Progressive education 9 Progressive taxation 7 Economic conditions 6 History 5 Income tax 5 Education 4 Philosophy 4 Social change 4 Social conditions 4 Science 3 Social history 3 Civilization, Modern 2 Economic development 2 Economic forecasting 2 Education, Primary 2 Equality 2 Forecasting 2 Forecasts 2 Social evolution 2 Social sciences 2 Socialism 2 Socialization 2 Utopias 2 Activity programs 1 Alliance for progress 1 Animal behavior 1 Archaeology 1