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The History of String Theory
I'm just not that excited about loop quantum gravity. It doesn't have the promise and the fruitfulness that string theory has. Other people will disagree or welcome to disagree. There are people out there who think it's a good idea, but might not be the right one. And another footnote there that I want to add on, which is an idea of unification, the theory of everything. That was the buzz phrase back in the 1980s.