Moral and ethical aspects Holocaust, Jewish (1939-1945) 18 History 16 National socialism 13 World War, 1939-1945 9 Historiography 8 Politics and government 6 Causes 5 Political aspects 5 Influence 4 Psychology 4 Social conditions 4 War criminals 4 Antisemitism 3 Political culture 3 Psychological aspects 3 Social aspects 3 Atrocities 2 Casualties 2 Collective memory 2 Foreign relations 2 Geography 2 Iraq War, 2003 2 Iraq War, 2003- 2 Jews 2 Memory 2 Philosophy 2 Social justice 2 War memorials 2 Abolitionists 1