Role of the U.S. dollar in the world economy

Answer the questions below to tie other readings in dialogue with Kagan's arguments:
How do the two articles and lecture on the role of the U.S. dollar in the world economy supplement and/or challenge Kagan's argument on U.S. support for the liberal world economic order? ("The U.S. Dollar as the World's Dominant Reserve Currency:" Kirchner, "The 'Reserve Currency' Myth;" and lecture notes on the U.S. Dollar)