Then there’s the many-worlds interpretation of quantum mechanics, which is popularly understood to mean that our universe is constantly splitting into a near-infinite number of differing versions. I’m largely agnostic about the idea, but I think its proponents would encounter less resistance if they made more modest claims about its implications. For example, some people argue that it renders our decisions meaningless, because whatever you do there’s always another universe in which you make the opposite choice, negating the moral weight of your decision. I’m pretty confident that even if the
...more
