Gravity out of Inertia
An appropriate consideration of the relationship between the concept of relativistic inertial-mass (rest-mass), and the law of four-momentum conservation, leads to a natural two-fold partition of the class of all relativistic collision processes into those which are, in our own terminology, inertially determined processes, and the rest. We find that the ‘inertially determined process’ can be given a geometric representation with a formal structure which suggests that gravitation might be, in effect, a particular case of such a process and therefore a phenomenon of inertia.