I’m pretty confident that even if the many-worlds interpretation is correct, it doesn’t mean that all of our decisions are canceled out. If we say that an individual’s character is revealed by the choices they make over time, then, in a similar fashion, an individual’s character would also be revealed by the choices they make across many worlds. If you could somehow examine a multitude of Martin Luthers across many worlds, I think you’d have to go far afield to find one that didn’t defy the church, and that would say something about the kind of person he was.
