What if Obi-Wan hadn't stumbled upon the clones?
'Begun, the Clone War has', Yoda says somewhere in this movie.
But the reason there are any clones at all, is totally random? Padmé gets attacked, her attacker gets shot by a poisenous arrow, a guy from a sixties diner knows the planet where this arrow comes from, and on this planet Obi-Wan discovers the clones.
What if any of these things hadn't happened? No clone wars? Seems like a pretty random thing that these clone wars ever happened at all?