Look at now, the West want to maintain their high living standard, at the same time billions of people in the newly rising countries like China, India, Russia, Brazil also want to live a Western life style, own cars and houses with swiming pools, luxury items, etc. However, the world only has finite natural resources such as oil, metals and even water and food. It's simply not enough to support 5 more Americas. We are in the similar situation before World War II when new powers Germany and Japan competing heads on with existing powers of England and the US for a larger economic slice in the world. Wars and conflicts will happen as a result of economic competition