What is the MAIN causes of World War 1 and briefly explain how it contributed to the war?

Well, the history books tell us that WW I was started after the Emperor of Austro-Hungarian empire was assassinated, which developed into a full-scale conflict in Europe. But if you read the book, Tragedy and Hope, by Carol Quigley, you will learn that there is a secret cabal that orchestrated, not just the 1st world war, but also the second one, and they also have plans for World War 3. see hhtp://LightOverDarkness.blogsome.com