There are lots of problems in the foundation of the fundamental theories of the Modern Physics - General Relativity and Quantum Mechanics, both the theories are developed on non-scientific and non-philosophical foundations, the founders have preferred their own views rather than the true scientific principles, this led both the theories into the wrong path, it is on the wrong path for over a century. An unbiased, scientific and critical analysis of the foundations of these theories have been performed by the author, the findings are unbelievable, there are two great epicycles in the form of Relativity and Quantum Mechanics. How these epicycles got created and continued to keep developing for almost a century, and the cures of these great epicycles have also been found by the author. All these findings are presented in a series of books - "A New Revolution in Physics", the series consists of 10 books.This is the first book of this series- "Why a New Revolution in Physics is Essential and Why it is Inevitable". The reasons are pointed out in short why a new revolution in physics has become essential and why it cannot be stopped, a berif history of development of these theories has been discussed and some of the crucial non-scientific steps have been pointed out which led the theories of the Modern Physics to the non-scientific path, the wrong steps are made absolutely clear so that they cannot be neglected scientifically anymore.A new theory is presented in the last book of the series, in the 10th book -"The Concepts: The Dawn of a New Physics - The Quassical Physics", which presents a new theory of physics which is consistent with the scientific and philosophical ideas of the Classical Physics and completely obliterates the fundamental theories of the Modern Physics - the theories of Relativity and the Quantum Mechanics and the other theories based on these theories. This looks impossible, but every argument and every claim in these books are based on strict scientific principles and empirical findings of the experiments which have been performed from per-Newtonian to the present modern era. The essence is, the Classical Physics has been emancipated from the abstract mathematics, the heart of the Classical Physics - the causality/the determinism has been re-established.This is a revolution being awaited for a century, a must read for anybody interested in fundamentals of Physics, a must read for the mainstream physicists.