Abstract
Shortly after the bus and subway bombings in London on July 7, 2005, United Nations Secretary General Kofi Annan called upon world leaders to reach consensus on a definition of terrorism, one that would facilitate 'moral clarity' and underwrite the United Nations convention against terrorism. The Secretary General's plea to world leaders help to highlight the practical significance and urgency of having a workable definition of terrorism. For the task of defining terrorism is not only theoretically or academically important; it is important for far-reaching practical, moral, and political purposes as well. For without at least some semblance of a workable definition of terrorism, it is impossible to identify and collect data on acts of terrorism throughout the world; to understand and address the root causes of terrorism; and to reach international agreement and undertake collective action in addressing terrorism. And yet in spite of practical and moral urgency of the task at hand, consensus on an acceptable definition of terrorism has been notoriously elusive.