You think somebody has to stay behind, or it was all for nothing.
"Everything humanity has built, it's a shame to leave it all behind, right? That's how I felt for a while too. How could somebody take away everything we've worked for, for thousands of years? It's just not right. But well, I don't see it like that anymore. Every building, book, painting, car, lamppost, cheeseburger, it's not worth much of anything in the big picture. It's not the end of everything just because there's nobody working at Walmart anymore. What matters isn't that it's over, what matters is that it happened. You don't have the responsibility to stay. If you don't want to I mean. You should do what's best for yourself. That's what I think."
The two of you continue down the road, chatting idly along the way. Eventually you pass by an old wooden grave marker by the side of the road.