4min chapter

Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas cover image

218 | Raphael Bousso on Black Holes and the Holographic Universe

Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas

CHAPTER

Quantum Gravity Is Not a String Theory, Is It?

I want to say this without diminishing string theory in any way, but the kind of progress that we're making right now could have, in principle, happened entirely without knowing anything about string theory. I'm trying to say that you and your friends are doing quantum gravity in a way that is not in opposition to string theory, but is also not built upon string theory. Now, for historical reasons, string theory does exist, and it's given us very powerful tools. But as a matter of principle, the properties that gravity has that allow you to do this are independent and maybe on some other planet, they're discovering that before they discover string theory. It doesn't mean there won't be

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