Professor Ling Jun Wang presents in this book first time ever a classical theory of unification of gravitational and electromagnetic forces, free of any of the fundamental problems of general relativity and particle physics. One of the important discoveries from this classical unification theory is the Wang's Law which states that the total linear momentum of the gravitational field transmitted into space is conserved. Wang's unification theory has naturally answered the historical action-at-distance and explained the inverse square law. The unification theory also predicts that the gravitational wave and the electromagnetic wave are propagated with the same speed of light. Dr. Ling Jun Wang is a high profile critic of the modern theoretical physics including relativity and particle physics. He believes that the multitude of fundamental problems of modern theoretical physics are inherent to its theoretical foundation, philosophy and methodology. Professor Wang calls for a new renaissance of physics, and for returning from mythological paradigm to the scientific classical physics before renormalization.