History Politics and government 111 Social conditions 70 Political aspects 53 Social aspects 53 Motion pictures 48 History and criticism 35 更多 ... Economic conditions 34 Economic history 30 Religious aspects 25 Race relations 23 Emigration and immigration 21 Diplomatic relations 20 Foreign relations 20 Government policy 20 Protest movements 20 Presidents 19 Financial crises 17 Influence 17 Ethnic relations 16 Histoire 16 Iraq War, 2003-2011 16 Economic aspects 15 Social movements 15 Immigrants 14 Political activity 14 African Americans 13 Democracy 13 Elections 13 Global Financial Crisis, 2008-2009 13 少 ...