During the Age of Enlightenment, Scientists were focused on characterizing the Laws of Nature. Before the Brilliant Experiments of Faraday et al, we considered Electricity an Magneticity as two totally separate disciplines. After the Ingenious Theories of Maxwell et al, we achieved complete Consilience, ultimately realizing that Electricity an Magneticity are just two sides of the same coin. Besides, the corresponding EM waves govern the field of optics, with the speed of light being calculable via the permittivity an permeability constants.