There are many, many theories, the Modified Relativity Theories, the Ether Theories and, among a very small group, there are the Emission Theories. This emission theory, the Extinction Shift Principle, successfully demonstrates for the very first time "pure" classical solutions to the entire set of problems of both Gravitation and Electromagnetism in Euclidean Space, applying a single set of principal axioms under Galilean transformations of velocities.