According to Wikipedia, Classical physics refers to pre-1900 physics, while modern physics refers to post-1900 physics which incorporates elements of quantum mechanics and relativity . In our opinion, Classical Physics is branch of Physics that should be described by classical notions, which define emergent phenomena. Emergent phenomenon is property that is a result of simple interactions that work cooperatively to create more complex interaction. Physically, simple interactions occur at microscopic level, and collective result can be observed at macroscopic level. WUM introduces classical notions, when the very first ensemble of particles was created and become possible to introduce notion "Medium of the World". We emphasize that Classical Physics is principally different from Quantum Physics that describes quantum objects, which have only four-momenta. Classical Physics is dealing with ensembles of quantum objects! Existence of the Medium is a principal point of WUM. It follows from observations of Intergalactic Plasma,Microwave Background and Far-Infrared Background Radiations. Abandoning of Luminiferous Aether by Special Relativity in 1905 was crucial for Classical Physics. It is a great pity that mainstream physicists at that time did not know (or forgot) theory of Luminiferous Aether developed by J. McCullagh in 1846. The Medium of the World is the Savior of Classical Physics! Don't throw the baby out with the bathwater. WUM is a natural continuation of Classical Physics. The main objective of the Model is to unify and simplify existing results in Classical Physics into single coherent picture of a New Cosmology.