History 31 Popular culture 18 Social life and customs 18 Social movements 16 Counterculture 14 Politics and government 12 Printed ephemera 10 Protest movements 9 Underground press publications 9 Vietnam War, 1961-1975 9 Civil rights 8 Political activism 8 Student movements 7 Nineteen sixties 6 Social conditions 6 Social history 6 Working class 6 Feminism 5 Mass society 5 Peace movements 5 Public opinion 5 Reconstruction (1939-1951) 5 Social surveys 5 World War, 1939-1945 5 Emigration and immigration 4 Motion picture actors and actresses 4 Motion pictures 4 Nineteen seventies 4 Popular music 4 Rock music 4