Terrorism evolves everytime an act is carried out. Something is learned, changed, and adapted to get a greater result the next time it is employed. If you are asking about the frequency of occurrence, that may be more difficult to pinpoint in that many acts that have occurred over the years may have been terrorist acts but were not classified as such or ever claimed by an organization.
Terror's goal is to create fear and chaos thus slowly undermining the organization and the ability to react to situations. Once enough fear is created, theoretically a society does not react at all for fear of retribution. WB.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.