It's not really about working against a global economy, it is a clue for the search engines to use when wieghing the results, because sites from anywhere in the world can get a .com domain, the server location can be the only clue as to the country of origin for the site. And, it could in theory promote the global economy by encouraging companies to purchase hosting in the various countries/regions where they are marketing their products.

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The best way to learn anything, is to question everything.