This paper explores and develops the ideas presented in -A quantum mechanical theory of gravitational interactions-. A satisfactory unification of the four forces can be achieved if we assume the electron neutrino is a point magnetic charge corresponding to the point electric charge of the electron. This is not to be confused with the idea of the classical magnetic monopole. The neutrino is assumed, however, to have a magnetic moment. This leads to the conclusion that magnetic fields are caused by the moton of mass rather than charge. The predicted value of the magnetic moment of the electron neutrino is mu_v = (1.61 x 10 DEGREES6)*mu_B where mu_B is the classical Bohr magneton.