Below is a link to a video clip featuring Niall Ferguson. In the video he discusses “Empires on the Edge of Chaos,” referring to the course of action the "we," the USA has taken. Be warned, the video is quite lengthy. I skipped to section 6 “Interest Payments as a Share of US Revenue.”
http://fora.tv/2010/07/28/Niall_Ferguson_Empires_on_the_Edge_of_Chaos#fullprogram
I think you will find this clip very, very interesting!
Happy Trading!!