The only hope left on Earth after the near-cataclysmic events of 2157 (p. 27) was the Federation of World Preservation, run by fifty citizens since its establishment in 2158. Each citizen was selected in a process known as the Intelliment Test, open to citizens between the ages of 18 and 22. Now, every thirty-five years, four hundred students from across the globe compete to replace the members of the Federation. - The History of the Federation of World Preservation, p. 49