I just read that string theory "started out as a generalization of quantum field theory where instead of point particles, string-like objects propagate in a(adsbygoogle = window.adsbygoogle || []).push({}); fixed spacetime background".

Is this true? And if so, did anyone try to do the same with a curved spacetime? What did they get? Or perhaps modern string theory already accounts for that, having incorporated (or arriving at) that at a later stage?

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# String threory assumptions about spacetime

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