<span>After World War II, the Marshall Plan helped countries in Western Europe with rebuilding their economies--since almost every country in Europe at this time had been devastated by the war. </span>
What time period? maybe with a little more info I can help you
The Mesopotamia has a good farm land that can feed all its population bringing in more people making it easy to feed more people because of the farm land they have. They created things like farming and irrigation so that they are suited for growth.