Population & demography 51 Political economy 16 Migration, immigration & emigration 14 Sociology 10 Social research & statistics 9 Human geography 6 Political science & theory 6 Sociology: family & relationships 6 Central government policies 4 Economics 4 Humanities 4 Social theory 4 Society & culture: general 4 Society & social sciences 4 Gender studies, gender groups 3 History 3 Modern history to 20th century: c 1700 to c 1900 3 Monetary economics 3 Politics & government 3 Refugees & political asylum 3 Social issues & processes 3 African history 2 Age groups: the elderly 2 Asylum law 2 Birth control, contraception, family planning 2 Climate change 2 Clinical & internal medicine 2 Communication studies 2 Conservation of the environment 2 Education 2