I think the general concept is that we all want to reduce them, and keep new countries from getting them.
So that we can keep them under our thumb(s)? I'm not saying that that's really the case, but I believe that that's exactly some of the reason that many 2nd and 3rd world nations are pissed at us -- because we have to be the top dog, and we'll keep every one else down to do it.
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Bitt Faulk