A theory of everything (ToE) or final theory is a putative theory of theoretical physics that fully explains and links together all known physical phenomena, and predicts the outcome of any experiment that could be carried out in principle.Weinberg (1993) The term mainly refers to the desire to reconcile the two main successful physical frameworks, general relativity which describes gravity and the large-scale structure of spacetime, and quantum field theory, particularly as implemented in the standard model, which describes the small-scale structure of matter while incorporating the other three non-gravitational forces, the weak, strong and electromagnetic interactions.
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