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Supersymmetry is promising, it predicted that the known elementary particles like quarks, photons electrons etc.. But It also predicts other super particles that exist in the universe. It kind of allows us to make sense of dark matter and work well with string theory.

So it's normal to suspect that I will help us unite the four forces but it remains controversial because of experiments in the Large Hadron Collider have not found evidence of supersymmetry so far. What I mean is, we haven't found the other extra particles that are supposed to be in the universe.