Albert Einstein (1879-1955) was a German physicist of Jewish origin, nationalized after Swiss, Austrian and American. In 1905 he published four scientific articles on the photoelectric effect, the Brownian motion, the theory of special relativity and the mass-energy equivalence (E = mc²). The first earned him the Nobel Prize in Physics in 1921, the second the degree of doctor and the last two would consecrate, over time, as the greatest scientist of the twentieth century. In 1908 he began to practice as a professor of physics at the University of Bern, then in Prague and finally in Berlin, city in which he lived until the rise of the Nazi regime made him leave Germany and move to the United States (1932). There he taught at the Institute of Advanced Studies in Princeton, and spent the rest of his life trying to integrate the physical laws of gravitation and electromagnetism as well as divulging pacifist, socialist and Zionist values.