Articles on the USA in a new global order

Here is an article from the World Policy Institute blog about how the world has changed economically and politically, such that the US must adjust to a role different from its traditional position as isolated from and on top of the rest of the world.  The article expands on and relates to a prior article by the same author on the revitalization of the economy in rural and industrial Middle America.  Lastly, a short bit on last year's Summit of the Americas in Cartagena, Colombia, also points to the US's declining influence in Latin America.