Political structures: totalitarianism & dictatorship 6 European history 5 History 5 Marxism & Communism 4 Political science & theory 4 Politics & government 4 Asian history 3 Cultural studies 3 Postwar 20th century history, from c 1945 to c 2000 3 Society & social sciences 3 Earth sciences, geography, environment, planning 2 Fascism & Nazism 2 General & world history 2 History of the Americas 2 Literature & literary studies 2 Literature: history & criticism 2 Media studies 2 Political ideologies 2 Political structures: democracy 2 Regional studies 2 Social research & statistics 2 20th century history: c 1900 to c 2000 1 African history 1 China 1 Civil rights & citizenship 1 Colonialism & imperialism 1 Consumerism 1 Economics 1 Feminism & feminist theory 1 Former Soviet Union, USSR (Europe) 1