Religious aspects Islam 31 Terrorism 16 Christianity 8 Jihad 5 Leadership 5 War 5 History 4 Islamic fundamentalism 4 Success 4 Doctrines 3 International offenses 3 Interpersonal relations 3 Islam and world politics 3 Terrorists 3 Violence 3 Attitude (Psychology) 2 Business 2 Congresses 2 Economic conditions 2 Economic development 2 Economics 2 Happiness 2 Interpersonal communication 2 Islam and politics 2 Islamic ethics 2 Just war doctrine 2 Management 2 Military art and science 2 Moral and ethical aspects 2