Some [[economist]]s, such as [[Adam Smith]] argue that the supply of infrastructure is the [[nation state|nation state's]] primary purpose. For example, the [[food distribution system]] includes [[transportation]] ([[truck]]s, [[ship]]s, [[railroad]], and [[airplane]]s), [[warehouse|warehousing]] (such as [[Amazon.com]], [[Costco]]), and [[retail]] facilities (such as [[Wal-Mart]] and [[grocery store]]s) which move [[food]] from the [[food production system]] to [[consumer]]s. | Some [[economist]]s, such as [[Adam Smith]] argue that the supply of infrastructure is the [[nation state|nation state's]] primary purpose. For example, the [[food distribution system]] includes [[transportation]] ([[truck]]s, [[ship]]s, [[railroad]], and [[airplane]]s), [[warehouse|warehousing]] (such as [[Amazon.com]], [[Costco]]), and [[retail]] facilities (such as [[Wal-Mart]] and [[grocery store]]s) which move [[food]] from the [[food production system]] to [[consumer]]s. |