What is the major contribution of Einstein to science?

Einstein was one of the famous scientist and physicist. He is the all rounder of physics. He has a huge contribution in the growth of science. He has made many new theories of physics. He has postulated many theories such as theory of relativity, quantum mechanics, photons theory, photoelectric effect, and many more equations and derivations. He has made the two pillars of modern physics that is quantum mechanics and theory of relativity.