Blowback is a 2004 lecture by Chalmers Johnson on the US Empire. Drawing comparisons with Rome, Johnson describes the end of the Republic through imperialism and militarism.
Blowback (57:00): MP3
The core of Johnson speech is on American militarism but discussing Iraq he explains the influence of the neocons as the main reason for war (although perhaps also overstating the case of oil politics too).
There is ample evidence that within this group [the Neoconservatives], and I’m not in any sense trying to be anti-israeli because I’m in fact quite alarmed by the dangers Israel is in today, but that many of these people have very close ties to the right-wing of the likud party, I mean close ties to Benjamin Netanyahu of which they have written papers for him, they’re personal associates of his, and things of this sort, and much of what they stand for does reflect the particular views of the sharonistas, if you will, that it serves their interests to destroy Iraq even if it has not particularly served ours.