Foreign relations -- 55 History -- 32 Politics and government -- 30 Politics and government 29 Economic conditions -- 21 History 13 Relations -- 13 more ... Social conditions -- 11 Sociology 10 Biography -- 9 Social conditions 9 Social policy 9 Presidents -- 8 Civilization -- 7 Race relations 7 Commerce 6 Economic conditions 6 Economic policy -- 6 Economics 6 Foreign relations 6 Social problems -- 6 Economic policy 5 Philosophy 5 Social problems 5 Civilization 4 Commercial policy 4 Foreign relations administration 4 Islam -- 4 Juvenile literature -- 4 Macroeconomics 4 less ...