History 566 Politics and government 443 Social conditions 383 Economic conditions 223 Economic history 200 Social aspects 141 Foreign relations 129 更多 ... Diplomatic relations 127 Political aspects 125 History and criticism 100 Social life and customs 81 Economic policy 72 Manners and customs 68 Democracy 55 Motion pictures 53 Race relations 53 Civilization 52 Religious aspects 47 Political activity 45 Economic aspects 43 Women 43 Ethnic relations 40 Government policy 40 Emigration and immigration 35 National security 34 Influence 33 Political culture 32 Islam 31 Military policy 31 Presidents 31 少 ...