I saw this on Netflix last night, but you can watch it online as well. It is essentially an examination of what the world would be like if the most doctrinaire libertarian view of foreign policy were implemented: the U.S. withdraws all of its military forces from abroad, and no longer engages in foreign intervention, anywhere.
It presents a fair and accurate representation of the non-interventionist perspective--not a strawman, and not a cartoon version of it. It points out why even the Europeans couldn't, or more accurately wouldn't, intervene to stop the genocidal war in Bosnia, or the attempt at it in Kosovo, until the U.S. did so. It points out what the likely consequences would be of U.S. withdrawal of forces from South Korea, and the withdrawal of the Seventh Fleet from the Asia Pacific Rim area.
Niall Ferguson is one of the more prominent experts that they interview, and to Ferguson's credit, he admits that he completely blew it in the 1990s in his view of U.S. intervention in the Balkans. He points out that peace is not the natural state of mankind, and in many parts of the world, as much as America gets a lot of hatred for its actions, the situation would be a lot worse without our involvement. America is effectively paying a heavy price in treasure and blood for the fact that much of the rest of the world lacks the maturity to behave like adults. Even after driving Israel into the sea, the Muslim nations of the Middle East would rapidly turn to destroying each other, because there are cultural problems there that are far larger than Israel. Countries that have moved beyond the "me against my brother, my brothers against my cousins, my cousins against the rest of the world" idiocy, like most of Europe, unfortunately, seem to have fallen into a pacifism that makes them unwilling to defend themselves, or to defend innocents in genocidal wars.
I was also pleased to see them point out something that I keep trying to get across: very little Middle Eastern oil goes to the U.S. It primarily goes to Europe and Asia. Our interest in Middle Eastern stability (it's a bit much to expect sanity in that region) is driven not by our direct interest in oil, but our interest in protecting the economies of our principal trading partners.