He had an article in Esquire last year that laid out his basic argument, it's really unbelievable, it's typical neocon bullshit, a combination of ruthless imperialism and total cluelessness about how the world works.
Here's the blurb from Esquire that describes the article:
Shortly after we wrote about military strategist THOMAS BARNETT in last December's Best and Brightest issue, he gave the Esquire staff a presentation on his theory of war and globalization, just as he regularly does for government leaders as an adviser to the Department of Defense. We'll never read the news the same way again. This month, Barnett delivers the same briefing to you in "The Pentagon's New Map (page 174), in which he maps out America's recent military encounters and predicts future ones based on patterns of global economic development. "We're at a time period not unlike after World War II," says Barnett, who is also a professor at the Naval War College in Newport, Rhode Island. "We're trying to ask the same great questions, like: How can a superpower today influence history for the better? We established this overarching ideology for so long that allowed us to justify anything, and that ideology was containment. In some ways, what I'm trying to argue is a new sort of containment—a containment of the new bad places and the desire to shrink them."Here's a link to the article, seems to be a summary of what the book is about:
http://www.nwc.navy.mil/newrulesets/ThePentagonsNewMap.htm