Political violence Terrorism 27 History 14 Insurgency 7 Politics and government 7 Democracy 5 Violence 5 World politics 5 Conflict management 4 Ethnic conflict 4 Guerrillas 4 Revolutions 4 Social conflict 4 Case studies 3 Congresses 3 Globalization 3 Government, Resistance to 3 Peace-building 3 Prevention 3 Religious aspects 3 Security, International 3 September 11 Terrorist Attacks, 2001 3 War 3 Ethnic relations 2 Europe 2 Guerrilla warfare 2 Internal security 2 International relations 2 Islam 2 Muslims 2