One new development in the way Americans work is the work ethic has improved since modern technology. Modern technology has increased the need for well done work.
Another would be the new amount of jobs. This is because more and more people are getting into computer science and that way there is more jobs for those in America.
The bombing of Pearl Harbor brought the United States into WW2. The United States stayed out of the way until this event because it was the breaking point for the nation. America had been attacked without what they deemed was a good reason and hundreds had been killed and injured.
