Modern physicists believe in the existence of four fundamental forces in nature. In order of increasing strength they are: gravitational, weak nuclear, electromagnetic, & strong nuclear forces. It has been shown that the electromagnetic, weak & strong nuclear forces are aspects of the same force, that is, the three strongest forces have been unified mathematically. The holy grail of modern physics is the mathematical unification of all four forces. Establishment physicists believe that at higher energies, a single fundamental force will be shown which acts as four separate forces at lower energies.                 

                                                                                                              

Big Science experiments have unified three forces, but physicists now believe the energy

required to unify gravity (the Grand Unification Energy) is beyond anything which could be produced on earth. Physics is now turning to Cosmology, hoping to see clues to the Grand Unification in high energy processes involving black holes, quasars or even the afterglow of the beginning of the universe.