Hi guys, I am new to physics forums and am an undergrad who is really interested in the philosophical implications of quantum physics. I know this isn’t a philosophy forum but upon skimming older threads regarding MWI I have come across an interesting number of posts by a few members named vanesch and ttn. Here is the post I was just looking at: https://www.physicsforums.com/threads/what-is-an-element-of-reality.62205/page-10#post-714587 They seemed to be suggesting that the only way the principle of relativity can be saved is with MWI - which is also solipsistic (i.e. everyone only experiences their own world where none of their friends are conscious). Does MWI really entail a sort of solipsism (like they suggest)? And is this the only way the principle of relativity can be saved? Kind of a crazy idea!