A model is presented that traces quantitatively the history of geodynamic processes, from the time of origin of the Earth to the present time. Initially, the Earth underwent a slow, cool, homogeneous accretion, then a non‐catastrophic formation and melting of the core. Thereupon, the gravitational interaction of the Moon and core produced a thermal power of about 1013watts. It is this power that creates the buoyant force for the upflow of convection. The convection is shown to serve three function: (1)the transference of heat from the mantle base to the surface for radiation to space: (2)the uplift to the surface and separation from the convection cycle of “incompatible” constituents: and (3) the redistribution of heat from the mantle's base to its body by conductive transfer. The “incompatible” constituents include continental, oceanic, atmospheric. Petroleum and radionuclide materials. They are stored initially in the asthenosphere region up to a limiting capacity that ensures the thermal integrity of the lithospheric shell. The capacity range is regulated by a periodic relief mechanis: namely, a controlled penetration of the lithosphere and eruption of continental and other “incompatible” material to the surface. The transfer of radionuclides to the surface region acts to regulate the conductive thermal loss from the Earth's interior in order to maintain a steady state. Mantle heat lost by removal of radionnuclides is replaced via conductive transfer from the hot, upflowing convection. The mechanisms of cooling in the 400‐km deep surface leg of the convection, the formation of the continents, and the pattern of heat flow from the Earth's surface are analysed in detail. A thermodynamic analysis of the convection cycle is presented, as well as detailed power analyses for the various work functions that are involved in the convection. Values obtained for power input and out put of the convection are in agreeme