“First, the idea of the multiverse is essentially the fantasy of preserving perfect information. One of the hard things to deal with in life is the fact that you destroy potential information whenever you make a decision. You could even say that's essentially what regret is: a profound problem of incomplete information. If you select one thing on a diner's menu, you can't know what it would have been like to taste other things on it, right then, right there. When you marry one person, you give up the possibility of knowing what it would have been like to have married any number of others. But if the multiverse exists, you can at least imagine there's another version of you who's eating that other thing you thought about ordering, or who's married to that other man you only went on two dates with. Even if you'll never see all the information for yourself, at least you'll be able to tell yourself that it's there.

'The second reason the multiverse seems like such a neat idea is that it gives human beings just an incredible amount of agency, which they can exercise with the least effort. Why, Carson here created an entire alternate universe when he ordered hash browns on the side of his French toast instead of bacon—'

'Ah, I should have gotten bacon, how could I forget,' Carson said, and attempted to hail the waitress.

'But the history of science shows that any theory that covertly panders to the human ego like that, that puts humans at the center of things, is very likely to be found out wrong, given enough time. So, just for the sake of argument, let's assume that there's just this one universe, and we're stuck with it. What happens to our time traveler then?”