International relations Politics & government 24 Warfare & defence 24 Military history 16 Political control & freedoms 16 Espionage & secret services 8 Ethnic studies 8 Globalization 8 Human rights 8 Regional studies 8 Central government policies 7 Defence strategy, planning & research 5 Terrorism, armed struggle 5 Asian history 4 Development studies 4 European history 4 International institutions 4 Peace studies & conflict resolution 4 Diplomacy 3 Environmental policy & protocols 2 Ethical issues & debates 2 Gender studies, gender groups 2 History of other lands 2 Human geography 2 International economics 2 Non-governmental organizations (NGOs) 2 Police & security services 2 Political science & theory 2 Political structures: democracy 2 Sociology 2