This article describes a model of Unitary Quantum Field Theory in which a particle is represented as a wave packet. The frequency dispersion equation is chosen such that the packet periodically appears and disappears without changing shape. The envelope of the process is identified with the ordinary wave function. The equation of such a field is nonlinear, and the mass depends on velocity in the same way as under relativistic invariance, but all the schizophrenia with time dilation and line contraction disappears. Under ordinary transformations, they reduce to the Dirac, Schrödinger, and Hamilton-Jacobi equations. A number of new experimental effects are predicted for both high and low energies. The fine structure constant (1/137) was calculated in 1988, and the masses of numerous (33) elementary particles, starting with the electron, were estimated in 2007 with an accuracy of at least 1%. Two pentaquarks, the theta baryon, the Higgs boson, and the 28 GeV particle were discovered 11 years later, all calculated with high precision. The overall picture of the world is based on a unified unitary field. These equations allow for the origin of the Universe without a Big Bang. Gravity is no longer a mystery. In principle, a completely new type of energy is possible for humanity. The civilization of the future will be free of hydrocarbons and coal.