There’s this idea that we are born as a discrete unit, placed onto the surface of the world, moving around in a fleshy little body. The world is just a map that you land on, randomly spawned like a character in a video game. And that idea is quite convenient for anyone who subscribes to a broadly liberal world view, because it allows us to believe in the ‘accident of birth’, an idea that ‘I’ could have been born anywhere and happened to fall out here and now. But unfortunately, each of us onl...