General & world history European history 19 Social & cultural history 18 Modern history to 20th century: c 1700 to c 1900 8 Agriculture & farming 4 Asian history 3 History 3 Humanities 3 20th century history: c 1900 to c 2000 2 African history 2 Criminal law & procedure 2 Criminal or forensic psychology 2 Gender studies, gender groups 2 History of the Americas 2 History: earliest times to present day 2 International criminal law 2 Literature: history & criticism 2 Political ideologies 2 Political science & theory 2 Colonialism & imperialism 1 Disability: social aspects 1 Economic history 1 Economics 1 Historiography 1 History of architecture 1 History of engineering & technology 1 History of other lands 1 History of science 1 Islam 1 Literary studies: c 1800 to c 1900 1