Economic conditions -- Politics and government -- Social conditions -- 30 History -- 10 Economic forecasting -- 7 Foreign relations -- 6 Periodicals 6 more ... Periodicals -- 6 Forecasting -- 5 Social conditions 5 Congresses -- 4 Economic conditions 4 History 4 Congresses 3 Foreign relations 3 Politics and government 3 Socialism -- 3 Civilization 2 Democracy -- 2 Economic policy -- 2 Intellectual life -- 2 Maps 2 National security -- 2 Regional disparities -- 2 Addresses, essays, lectures -- 1 Agriculture 1 Agriculture -- 1 Arts -- 1 Biography -- 1 Blacks -- 1 less ...