"To accommodate for lack of dependable rainfall" would be the best option as to why the ancient Chinese organized large groups of people to build and maintain irrigation systems, since when rainfall would not come for long periods of time, the crops would likely die without proper irrigation.
Washington believed that it was necessary to strike a delicate balance between making the presidency powerful enough to function effectively in a national government, while also avoiding any image of establishing a monarchy or dictatorship.
After the end of the first world war and the dissolution of the Ottoman Empire, the British took control of Palestine - Which, modernly, is now Israel, Palestine, and Jordan.
