War Economic aspects 24 History 14 Psychological aspects 8 War and society 8 Violence 5 Civil war 4 more ... Economic conditions 4 Political aspects 4 Terrorism 4 Causes 3 Petroleum industry and trade 3 Prevention 3 Red Cross and Red Crescent 3 Relief of sick and wounded 3 War on Terrorism, 2001-2009 3 Capitalism 2 Child psychology 2 Competition, International 2 Economic history 2 Economic policy 2 Finance, Public 2 Gender identity 2 Insurgency 2 International cooperation 2 International relations 2 Moral and ethical aspects 2 Peace 2 Petroleum reserves 2 Political violence 2 less ...