Politics and government 955 History 228 Underground press publications 107 Presidents 100 Civil rights 98 Foreign relations 89 Protest movements 78 Political aspects 75 Political activists 73 Vietnam War, 1961-1975 73 Counterculture 71 Social conditions 70 Radicalism 42 Political culture 41 Race relations 40 Election 39 Student movements 39 Democracy 35 Conservatism 30 Social movements 28 Mass media 25 Political activity 25 Political campaigns 24 Social aspects 22 Economic conditions 21 Causes 19 Public opinion 19 Political parties 18 Progressivism (United States politics) 18 Addresses, essays, lectures 17