The UN has been trying, in vain to arrive at a definition for terrorism that would be acceptable to its members.  Different definitions vary the number of victims of terror over the past 50 years from hundreds to hundreds of thousands, and while I would think neither number is close to correct, it raises the very pertinent issue of "what is terrorism?"  But while debating whether to make the definition so narrow as to rule out any resistance against occupation or to make the definition so wide as to include all killings of civilians, we lose site of the fact that terrorism itself has changed, that it has now become a psychological weapon.  And since this fact changes how you have to fight terrorism, this needs to be focused on by the UN.