Einstein was one of the most creative scientists in
human history. He transformed mankind's understanding of nature
on every scale, from the smallest to that of the cosmos as a whole.
His relativity theory revolutionized scientific thought with new conceptions of time, space, mass, motion, and gravitation. By treating matter and energy as exchangeable he laid the basis for splitting the atom.
It has been said that his general relativity theory is so profoundly original that it might not have developed even by now without him.