Crop Circles as we know them today were invented by two men in England (Doug Bower and Dave Chorley) in the late 1970s-early 80s. They are generally made using simple implements (boards and rope) and using natural landmarks to guide the shapers. Even increasingly complex crop circles can be duplicated, as was shown on a show on the Discovery Channel (can't think of the name...)Crop Circles: Mysteries in the Fields.
Thats it.
Certainly there are some crop circles that were proven to be creations by people as in dosters example about Doug Bower and Dave Chorley. However, there are plenty of crop circles that have appeared at various times in locations all around the world that are unexplainable. Some of the first crop circle sightings actually occurred in the 1880s in England long before Bower and Chorley were born.
Statistically, I believe the number is 20 percent that occur due to unknown or unexplained causes.
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.