Economic conditions -- Social conditions -- Politics and government -- 18 Congresses -- 2 History -- 2 Social conditions 2 Socialism -- 2 more ... Congresses 1 Directories 1 Economic conditions 1 Economic forecasting -- 1 Economic policy 1 Encyclopedias 1 Forecasting 1 Foreign relations -- 1 History 1 Intellectual life -- 1 Maps 1 Maps -- 1 Military policy -- 1 Pictorial works 1 Public opinion 1 Public opinion -- 1 Public opinion. -- 1 Relations -- 1 Social policy -- 1 less ...