The purpose of this book is to focus attention on the types of individuals and groups that are prone to terrorism in an effort to help improve counterterrorist methods and policies. The emergence of amorphous and largely unknown terrorist individuals and groups operating independently and the new recruitment patterns of some groups, such as recruiting suicide commandos, female and child terrorists, and scientists capable of developing weapons of mass destruction, provide a measure of urgency to increasing our understanding of the psychological and sociological dynamics of terrorist groups and individuals. The approach used in this study is twofold.