Music is the common language that links the over 214 nations represented at Tomorrowland, but the festival’s significance is greater. For three short days, young people from all over the globe share their national pride, and live alongside each other in peace. That’s more than any annual music event, let alone dance music event, can say it pulls off. If the first U.S. edition, TomorrowWorld in Atlanta (September 27-29), creates even the first strains of that feeling stateside, the transplant will have been a success.