Silly Asses (1958) - Isaac Asimov

The people of Earth develop nuclear power. Naron, a long-lived Rigellian who serves as the Keeper of galactic records, notes this achievement and records humanity as having reached maturity. Until he discovers something else... Despite the seriousness of the subject, Asimov keeps a light touch in this very short story. A 1-minute read. Naron of the long-lived Rigellian race was the fourth of his line to keep the Galactic records. He had the large book which contained the list of the numerous races throughout the Galaxies that had developed intelligence, and the much smaller book listing those races that had reached maturity and had qualified for the Galactic Federation. In the first book, a number of those listed were crossed out; those that, for one reason or another, had failed. Misfortune; biochemical or biophysical shortcomings; social maladjustment, etc., took their toll. In the smaller book, however, no member listed had yet blanked out. And now Naron, large and incredibly…