Politics and government History 256 Underground press publications 118 Civil rights 104 Social conditions 96 Protest movements 87 Political activists 81 Counterculture 80 Vietnam War, 1961-1975 73 Foreign relations 62 Political aspects 62 Economic conditions 57 Radicalism 46 Student movements 45 Race relations 44 Political activity 35 Social movements 34 Political culture 30 Political parties 27 African Americans 25 Populism 24 Social life and customs 24 Democracy 22 Public opinion 22 World politics 22 Civilization 20 Intellectual life 20 Social aspects 20 Nationalism 19 Socialism 19