History 136 Social conditions 43 Social aspects 41 Politics and government 33 Vietnam War, 1961-1975 30 Race relations 28 African Americans 27 more ... Emigration and immigration 24 Government policy 23 History and criticism 23 Racism 23 Civil rights 19 Economic conditions 19 Social life and customs 19 Attitudes 18 Foreign relations 18 International relations 18 Psychological aspects 18 Protest movements 15 Moral and ethical aspects 13 Motion picture producers and directors 13 Biography 12 Manners and customs 12 Rock musicians 12 Women 12 Education 11 Immigrants 11 Law and legislation 11 Prevention 11 Iraq War, 2003-2011 10 less ...