Why did the nile river foster a very different civilization and enable centralized authority of the pharaoh?

Well, when the River Nile first flooded, it gave the farmers crops all the water they needed. It influenced the pharoah and the government by showing them that the flood could also kill people, too. When seeing this, the pharoah and the government realized that the people should be held at safe places for the amount of time it lasted. It is the longest in the world. Actually, they didn't live on the Nile river. They really just lived in palaces that were built by laborers. When they died, they were put in pyramids to RIP. (Rest in Peace) The Kings of Egypt were not called Pharaohs by the ancient Egyptians. This word was used by the Greeks and Hebrews, and today is commonly used for the ancient Kings of Egypt. It is not known how many kings ruled in Egypt, for at times in its ancient past the country was split up, and there were at least several kings at the same time - plus there were most likely be rulers before recorded history. Given this qualification the answer would be Aha of the 1st Dynasty. Prior to this we have Dynasty 0 which obviously would have had 'rulers' but it has not been possible to decipher their real names and there is great uncertainty as to which of these individuals were actually rulers. The river in Nubia is different from the one in Egypt because the Nile River in Nubia is not to smooth as the Nile River in Egypt. It is the longest river in the world.