Population 26 Population -- 11 Population policy 5 Birth control -- 4 Economic conditions -- 4 Population forecasting -- 4 Economic aspects 3 more ... Economic conditions 3 Economic development 3 Economic development -- 3 Economic policy 3 Emigration and immigration 3 History -- 3 Politics and government -- 3 Populism -- 3 Social aspects 3 Social conditions 3 Congresses 2 Democracy 2 Demography -- 2 Economic aspects -- 2 Economic forecasting -- 2 Environmental aspects 2 Ethnic relations 2 Food supply 2 Forecasts 2 Minorities -- 2 Populism 2 Social change 2 Twenty-first century -- 2 less ...