Economic conditions -- Politics and government -- Social conditions -- Congresses -- 2 Congresses 1 Economic forecasting -- 1 Foreign relations 1 more ... Handbooks, manuals, etc. -- 1 History -- 1 Intellectual life -- 1 Maps 1 Maps -- 1 Military policy -- 1 Public opinion 1 Public opinion -- 1 Public opinion. -- 1 Social conditions 1 Socialism -- 1 less ...