Einstein - What is the theory of Relativity?

Einstein revolutionized physics with his theory of relativity. In tribute of this great achievement, I found a paper he published for the London Times in 1919. While this paper is more technical in nature, it certainly is written for the layman to have a reasonable understanding. More importantly, there is a certain awe in reading the words from a man whose theory advanced modern physics.  Once I've posted the paper in its entirety (its will require 2-3 posts), I will include video and other references to assist with further understanding these laws and theories.