Forecasts Twenty-first century Forecasting 28 Vingt et unième siècle 14 Economic forecasting 12 History 7 Social prediction 7 more ... Twentieth century 7 World history 6 Economic conditions 5 Environmental policy 5 Civilization 4 Civilization, Modern 4 Economic history 4 Food supply 4 Human ecology 4 International economic relations 4 Social aspects 4 cambio tecnológico 4 changement technologique 4 futur 4 future 4 futuro 4 technological change 4 Capitalism 3 Congresses 3 Economic aspects 3 Economic policy 3 Natural resources 3 Politics and government 3 less ...