History -- 4 Politics and government -- 3 Foreign relations -- 2 20th century 1 Adddress, essays, lectures -- 1 Address, essays, lectures 1 Address, essays, lectures -- 1 more ... Capitalism -- 1 Decentralization in government -- 1 Economic conditions -- 1 Economic policy -- 1 Foreign econoic relations -- 1 Foreign economic relations -- 1 Foreign relation -- 1 Government policy -- 1 Migration, internal -- 1 Opposition (Political science) -- 1 Petroleum industry and trade -- 1 Political culture -- 1 Political parties -- 1 Population -- 1 Social conditions -- 1 Working class -- 1 less ...