@oralloy,
That is one of the possible theories that I read. It went along the lines that in order to show the world that they couldn't mess with the US, they needed a country that was:
- strategically / economically important
- had a large military
- that military wasn't advanced
- had a leader they could easily demonise
- and a couple of other criteria that I don't remember off the top of my head
And Iraq, unluckily for Iraq, ticked off all the boxes. However, if you buy this story, then you also accept that the US invaded an innocent country (as in it had nothing to do with 9-11) for it's own benefit.
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I've also read credible theories about Iraq having moved to selling Oil in Euro's in 2000, and Iran was considering doing so (and still is)...and that if Iran followed suit, then the rest of the ME could follow suit.
Then:
- Libya proposed the Gold Dinar (rather than US dollars),
- Russia, Indonesia, Venezuela started considering switching to the Euro
- China in 2003 moving some of it's reserve from US dollars to Euro's
If that happened, it could trigger a domino effect that could see US lose Reserve Currency status to the Euro. There are plenty of economists who believe that if that happens, there's a 50% chance of the US going into recession.
If you accept this reason, you also accept that the US invaded a country for it's own benefit.
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The Euro v Dollar argument as being the cause for the war, has since become much more popular (I only found the one reference when I first went searching for the 'why?')
There was also another credible theory that I read, that I no longer recall the details of. But the' reason' is probably a combination.
Certainly the lie of WoMD (which phrase I don't recall ever having heard being used politically before that war) wasn't the reason.