To me, one of the most profound questions we can ask is: 'So what?' And so what if there's an indefinite number of worlds with alternate 'us-es' in them? The 'so what,' to me, comes alive when I ask myself: 'What if I could find a way to get in touch with those alternate mes who made those choices?' That is, persons who, if I saw them now, I wouldn't even recognize because their choices, once small, have multiplied to make them such different people.