Regional & national history History 17 Social & cultural history 10 20th century history: c 1900 to c 2000 6 European history 6 General & world history 5 Modern history to 20th century: c 1700 to c 1900 5 History: specific events & topics 4 Social & cultural anthropology, ethnography 4 Asian history 3 History of other lands 3 History of the Americas 3 History: earliest times to present day 3 Russia 3 Second World War 3 Agricultural science 2 Anthropology 2 British & Irish history 2 Ethnic studies 2 Jewish studies 2 Judaism 2 Literature & literary studies 2 Literature: history & criticism 2 Oral history 2 Politics & government 2 Postwar 20th century history, from c 1945 to c 2000 2 Regional studies 2 Science: general issues 2 Society & social sciences 2 The environment 2