NPR ran a story earlier tonight on the upcoming 100th anniversary of the start of World War One, and used it as a launching point for a "counterfactual history" of the World War that didn't happen. Beginning with Franz Ferdinand not being assassinated, their guests went merrily down Speculation Lane:

http://www.npr.org/2014/03/11/285…

Feel free to jump their train or start onme of your own. :D