An emerging academic/scientific branch predicted that the decade of the 2020's would be a turbulent decade in US history.
All that was needed was a trigger.
https://images.theconversation.com/files/14023/original/wk75hjcq-1344459492.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=600&h=431&fit=crop&dpr=1
Its a very interesting and detailed read.