The idea that there is only one force in physics is not novel. The EM force is already viewed as one with the weak force. Gravity and the strong force remain. The clue to understanding these four as one is time.
Time is not constant. It changes with scale. On small scales time moves fast. On large scales it goes slowly. If one had a strong enough microscope one would see the cosmos in an atom.
This leads to a new math. Action at-a-distance is the basic concept. Is it possible that by applying a time modulus, all the forces could be subsumed into one?
Attraction.
A spinning nucleus creates a dipole - electromagnetic lines of force act on electrons in orbit. So too a spinning star or planet. Again, spin seems to hold the key. In this case, it creates the field which directs other nearby bodies.