Psychological aspects Terrorism 24 Psychology 18 War 16 Combat 14 Social aspects 14 Prevention 9 International relations 8 Psychology, Military 8 Leadership 7 Terrorists 6 Thesis 6 Case studies 5 Educational psychology 5 Peace 5 Religious aspects 5 Violence 5 Decision making 4 Dissertations, Academic 4 Government policy 4 History 4 Morale 4 Political aspects 4 Teachers 4 Teaching 4 War and society 4 World War, 1914-1918 4 Air warfare 3 Congresses 3 Military history, Modern 3