When you make a decision that can make your life go in a completely different direction? Like in the movie Sliding Doors. For those who haven't seen it, it splits into to alternate universes- one in which the main character Helen misses the train, the other in which she catches it. Her life goes in two completely different directions, and in one she actually dies.
Another example is in the Dark Materials trilogy. They talk about alternate universes, and how with each decision you make, it could be entirely different in another universe.
Is there a name for this? And where can I read more about it?
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