Social aspects 186 Memory 176 History 104 Collective memory 46 Historiography 29 Influence 28 Social conditions 25 Psychological aspects 24 Political aspects 18 Social life and customs 16 Philosophy 14 African Americans 13 National characteristics, American 13 Race relations 13 War and society 13 Civilization 12 Memorialization 11 Monuments 11 Group identity 10 Public history 9 Memorials 8 Politics and government 8 Social psychology 7 Vietnam War, 1961-1975 7 World War, 1914-1918 7 Historic sites 6 Holocaust, Jewish (1939-1945) 6 Intellectual life 6 Slaves 6 World War, 1939-1945 6