They created a limited government because they were escaping an oppressive one. They had been under the rule of Great Britain, a basically unlimited government. They did not want to create the same thing to replace the one that they had known.
After a long period of civilization, Ancient Egypt fell to the Persians after they invaded the place in 343 B.C. That was basically the end of the civilization altogether. When you hear about the Egyptians still existing after that time period, it means that the area is taken over by Persians, later Romans, and etc.
A. Transcontinental railroad
