People who insist on saying 'Told you so' don't generally make themselves too popular. Not, that is, unless they're science fiction writers, and i do write sf occasionally. The likes of Jules Verne and Arthur C. Clarke are at least as famous for their accurate predictions as their storytelling skills. And practically a dozen years ago, I sat down and wrote a near-future short novel called 'Beyond the Western Walls,' in which the developed world has cut itself off completely from the Third World. Including -- yup -- a huge great wall along the US-Mexican border. It first appeared in the collection 'Ghost Dance' from Sarob Press, but is now available in my eBook collection 'Dark Futures: SF Meets Horror,' which can be found on Amazon Kindle, B&N Nook, Kobo, and Smashwords. And a few other locations too, I shouldn't doubt. I'm too busy predicting stuff to list them all.