Five dystopian societies that might actually function

At the B&N Sci-Fi & Fantasy Blog Jeff Somers tagged five dystopian societies that might actually function. One title on the list:
The World State (Brave New World, by Aldous Huxley)

Huxley is one of the few creators of a dystopia to have addressed the wide-ranging difficulties faced in running a large-scale society predicated on complete control. Whereas many dystopias amount to a single concept