You’re probably familiar with the saying the coward dies a thousand deaths, but the brave die only once. It sounds great but I think there’s something to be said for dying a thousand deaths. The imaginative person lives a thousand lives and the unimaginative only one.
When engaging with a fictional story, we can happily imagine worlds that are factually very different from our own. Science fiction, fantasy, utopian and dystopian fiction: all of these present no significant hurdle to the imagination. But we seem to strongly resist imagining worlds that are morally very different from our own.