European history 10 Research & information: general 9 History of the Americas 8 General & world history 7 History 7 Humanities 4 International relations 4 Naval forces & warfare 4 Slavery & abolition of slavery 4 Social & cultural anthropology, ethnography 4 Agriculture & farming 3 Anthropology 3 Archaeology 3 Asia 3 Colonialism & imperialism 3 Development studies 3 Literary studies: from c 1900 - 3 Literature: history & criticism 3 Modern history to 20th century: c 1700 to c 1900 3 Science: general issues 3 Australasian & Pacific history 2 Caribbean islands 2 Christianity 2 Climate change 2 Cultural studies 2 Development economics & emerging economies 2 Early modern history: c 1450/1500 to c 1700 2 Earth sciences, geography, environment, planning 2 Ecological science, the Biosphere 2 History of religion 2