A decision by a single character, often a very small change, would have completely altered the Star Wars trilogy. Brian Murphy of Dorkly offers eight examples. Sadly, no change to the original trilogy could have prevented the prequels from taking place.
Link -via Bit Rebels
Previously by Brian Murphy: Star Wars Facebook Updates
Bad Guy:
He doesn't like you. I don't like you either.
Luke:
Yea, well that aint what your momma said.