Unified Field Theory explained. It's a Grand Theory of Everything.

Albert Einstein worked hard to create a unified field theory that would combine gravity and electromagnetism into one clear idea. | Hashem Al-Ghaili

Is there a deeper level theory beyond quantum mechanics and general relativity that unites the two— a unified field theory— from which we will finally be able to explain the origin and nature of the fundamental forces, elementary mass, and the physical constants? It is mostly presumed that such a unified physics model will require novel physics and even exotic new ideas, exemplified in approaches like string theory, with 11 dimensions and 10 to the power of 500 compactification solutions. Howeve