Genocide & ethnic cleansing 13 Second World War 11 War crimes 9 European history 7 History 7 Slovenia 7 Sociology 7 20th century history: c 1900 to c 2000 6 The Holocaust 6 Cultural studies 4 Gender studies, gender groups 4 Humanities 4 Oral history 4 Politics & government 4 African history 3 Fascism & Nazism 3 General & world history 3 History of the Americas 3 Human rights 3 International human rights law 3 International relations 3 Jewish studies 3 Literature: history & criticism 3 Social & cultural anthropology, ethnography 3 Asian history 2 Australasian & Pacific history 2 Austria 2 Biography: historical, political & military 2 Collected biographies 2 Crime & criminology 2