Terrorism is a term constructed during the European Enlightenment era and inextricably associated with nation-building. To argue that terrorism has existed for all time is not only imprecise, but also creates serious problems for scholars who try to analyze terrorism systematically. Though the content of each article in this special issue reflects significantly different perspectives, terrorism is in the process of being negotiated and renegotiated within the changing boundaries of territories, nations and states. The research presented here, whether intentionally or not, emanates from this basic assumption. From fear of torture to the commemorative processes of civil society, terrorism is invoked to inspire and mobilize the national soul and (re)establish the sovereignty of political boundaries-states. When we received the invitation to create this special issue on terrorism, we realized that our approach to the study of terrorism would be challenged. Our approach focuses upon how definitions of terrorism and terrorists are created and the impact of those definitions. From the sociological study of law and deviance, we examine the processes that shift the moral boundaries, for example, between normal and deviant action. Under what conditions is deviant or violent action labeled as terrorism rather than war, revolution or protest? Surprisingly, a systematic review of the research on terrorism reveals a paucity of work in this area. Our approach also stresses the relevance of examining the role of the state in the construction of terrorism and terrorists. For the purpose of this issue, we build on the straightforward view of the state as outlined by Dwight D. Eisenhower, who emphasized the power of the military-industrial complex. As a former President and United States Army general, he was sensitive not only to the inappropriate use of power by the state in effecting change, but also to the ability of the state to evade the checks and balances of government. Of course, now the state has become the military-postindustrial complex and frequently operates through multinational corporations that often are beyond the control of moral or legal regulations. In addition, the state typically uses inappropriate means to maintain or expand its power, domination, and profit. United States Supreme Court Justice Louis D. Brandeis recognized the potential terror of institutionalized violence as practiced by the state. The state can legitimate the use of terror as a formal rational practice in the form of collateral damage or saturation bombing. The state is conceptualized here as the political apparatus that controls or attempts to control society. Recent research claims that globalization is weakening the state; for example, many suggest that the increasing power of multinational corporations and international nongovernmental organizations is eroding the state's power (Ohmae, 1995; Tanzi and Schuknecht, 1997). It seems premature to comment on this research, except to say that what we may be witnessing is in fact the development of different forms of the global state. Surely, the sociological perspectives on interlocking organizations, including the strength of weak ties, should be useful for future research on this topic. Some of the scholars whose work is included in this special issue use a framework similar to ours; however, we also accepted articles that focus upon the reasons people cross moral boundaries since that perspective can be useful in comparative sociological work. These articles also challenge other scholars to address the concept of terrorism directly in a meaningful way (Senechal de la Roche, 2004; Stern, 2003). In the first article, Charles Tilly critiques theories on terrorism by Jessica Stern, a 'former superterrorism fellow' in her popular book Terror in the Name of God, comparing Stern's definitions of terrorism with those definitions disseminated by the United States government. …