Depending on how strict you are, you can trace string theory all the way back to the 1940s, or at the very least to the late 60s [1]. Supersymmetry is from the

Depending on how strict you are, you can trace string theory all the way back to the 1940s, or at the very least to the late 60s [1]. Supersymmetry is from the early 70s [2]. They are exactly the mainstream kind of thing which Hossenfelder is referring to when she writes about "physics beyond the standard model which the Large Hadron Collider (LHC) was supposed to find". For every lone wanderer exploring a long shot like octonion math, there are thousands writing yet another paper on some variation of the old theme. [1] https://en.wikipedia.org/wiki/History_of_string_theory https://en.wikipedia.org/wiki/History_of_string_theory [2] https://en.wikipedia.org/wiki/Supersymmetry#History https://en.wikipedia.org/wiki/Supersymmetry#History