The question of a definition of terrorism has haunted the debate among states for decades. A first attempt to arrive at an internationally acceptable definition was made under the League of Nations, but the convention drafted in 1937 never came into existence. The UN Member States still have no agreed-upon definition. Terminology consensus would, however, be necessary for a single comprehensive convention on terrorism, which some countries favour in place of the present 12 piecemeal conventions and protocols.The lack of agreement on a definition of terrorism has been a major obstacle to meaningful international countermeasures. Cynics have often commented that one state's "terrorist" is another state's "freedom fighter".
If terrorism is defined strictly in terms of attacks on non-military targets, a number of attacks on military installations and soldiers' residences could not be included in the statistics.
In order to cut through the Gordian definitional knot, terrorism expert A. Schmid suggested in 1992 in a report for the then UN Crime Branch that it might be a good idea to take the existing consensus on what constitutes a "war crime" as a point of departure. If the core of war crimes - deliberate attacks on civilians, hostage taking and the killing of prisoners - is extended to peacetime, we could simply define acts of terrorism as "peacetime equivalents of war crimes".
Proposed Definitions of Terrorism
1. League of Nations Convention (1937):
"All criminal acts directed against a State and intended or calculated to create a state of terror in the minds of particular persons or a group of persons or the general public".
2. UN Resolution language (1999):
"1. Strongly condemns all acts, methods and practices of terrorism as criminal and unjustifiable, wherever and by whomsoever committed;
2. Reiterates that criminal acts intended or calculated to provoke a state of terror in the general public, a group of persons or particular persons for political purposes are in any circumstance unjustifiable, whatever the considerations of a political, philosophical, ideological, racial, ethnic, religious or other nature that may be invoked to justify them". (GA Res. 51/210 Measures to eliminate international terrorism)
3. Short legal definition proposed by A. P. Schmid to United Nations Crime Branch (1992):
Act of Terrorism = Peacetime Equivalent of War Crime
4. Academic Consensus Definition:
"Terrorism is an anxiety-inspiring method of repeated violent action, employed by (semi-) clandestine individual, group or state actors, for idiosyncratic, criminal or political reasons, whereby - in contrast to assassination - the direct targets of violence are not the main targets. The immediate human victims of violence are generally chosen randomly (targets of opportunity) or selectively (representative or symbolic targets) from a target population, and serve as message generators. Threat- and violence-based communication processes between terrorist (organization), (imperilled) victims, and main targets are used to manipulate the main target (audience(s)), turning it into a target of terror, a target of demands, or a target of attention, depending on whether intimidation, coercion, or propaganda is primarily sought" (Schmid, 1988).