Henry Ford perfected the technique of the assembly line which allowed him to mass produce the first automobiles during the twenties. Now, he didn't invent the assembly line or the automobile; however, he changed America forever in that he came up with the means to mass produce the automobile so it could be sold at a reasonably low price to middle class America. His "Model T Automobile" produced from 1908 to 1927 was his most revolutionary automobile; it was the car that made transportation by the middle class much more practical. I believe in Brave New World, Huxley actually chooses the creation of the Model T as the start of his new world. So instead of using christ's resurrection as the turning point of the world, Huxley uses the creation of the Model T. For example, a year in the novel might be 50 A.F. or 50 years After Ford.