 (reprinted in the trade paperback "The Greatest Superman Stories Ever Told") gave more insight into Krypton's society.This era also established that the Guardians of the Universe, the administrators of the interstellar police force, the Green Lantern Corps, were themselves aware of Krypton's pending destruction and assigned Green Lantern Tomar-Re to avert it, but he was ultimately unsuccessful in his attempt.In 1979, a three-issue miniseries titled "World of Krypton" was published, providing a great amount of detail into Krypton's history just before its destruction, along with the life story of Jor-El himself.