The book proposes another approach for Physics, based on a two-dimensional geometric model in accordance with Plato's methodology, which the philosopher had propositioned to his students for the study of Nature. The novelty of the book lies in the fact that from this geometric model and through one to one correspondences between the equations of simple geometric objects and the equations of the elementary physical entities, all the fundamental theories of Physics, such as Classical Mechanics, Maxwell's equations, Special Relativity, Quantum Mechanics, and Einstein's Equations of General Relativity are produced. In addition to unifying the theories of Physics, the book interprets many issues that have not been answered so far, for example, why elementary particles appear in three generations, why the proton does not decay, why there is a wave function "collapse" during the metering process and so on.