... Both Athas.org and Paizo's renditions of Dark Sun are official versions approved and sanctioned by Wizards of the Coast, even if they are mutually exclusive, and provide two different renditions of the setting. Some have argued that the products are not mutually exclusive, but simply refer to two different time periods in the world, hundreds of years apart. Two of the authors of the Paizo materials, Chris Flipse and Jon Sederquist, are on the Athas.org "overcouncil," and are responsible for the much of the development of the Athas.org rules.