Answer:
He is also known for his discovery of the photoelectric effect, for which he won the Nobel Prize for Physics in 1921. Einstein developed a theory of special and general relativity, which helped to complicate and expand upon theories that had been put forth by Isaac Newton over 200 years prior.
Explanation:
Between Mexico City the stuff he said ^
The U.S. not only joined the UN but they followed a new policy away from Isolationism and were now protectors of the world rather than separated from it
