Army

Every nation has a well built army to protect them from the neighboring country attack. A nation will spend on army more than anything. If you think of a fact, if we use the money which we spend on army to any other purposes, the whole world will be prosperous. While they are so many people dying every day because of food scarcity. So if all the nations remain in peace, they can save lot of life, who are dying in war and also can save lot of money that we spend on army. I believe this will happen in near future.