Hello, Some consider Albert Einstein, some think it was Galileo Galilei, some consider that E=mc^2 formula revolutionized the entire picture of physics, some consider James Clerk Maxwell's equations of electromagnetism. I consider it was Sir Isaac Newton. Newton can be well considered as the father of modern physics. The gravitational laws based on which Einstein later founded the General theory of relativity came from Newton. Also 'Optiks' the first theory of light related to reflections, refractions came from Newton. The basic building block of the way Nature behaves, GRAVITY was first explained by Newton and then taken forward by others. What do you think?