It was the nation's communication system, its only means of survival for the country, in other words its lifeblood. As has been stated before, without the Nile there would be no Egypt. The Nile was a creature of habit; it increased in summer and was lower in winter. It was this life cycle of the Nile that allowed the nation's development and survival. The fact that the Nile was a creature of habit lies in its origin. The Nile is made up of two rivers, one called the Blue Nile and the other White Nile. In the summer, when the water level rose, this was the flood, the Egyptian word for summer was Akhet which, translated, means flood. The flood, so vital to Egypt, was caused by a huge volume of water in central Sudan pouring into the White Nile, raising its level while monsoon rains in the highlands of Ethiopia, home of the Blue Nile, inundated the blue water. With these two rivers, the White Nile and the Blue Nile, flooding and flowing into the Nile River, they caused the Nile to break its banks and flood, while floods of this kind are destructive, but they also brought with them a commodity very valuable crop that Egyptians need for a successful agricultural year,