Final answer:
The tradition of secrecy in fraternities originated from ancient rites of tribal initiation. The specific fraternity from which the tradition originated is unclear, but possible candidates include the Eleusinian Mysteries, the Mysteries of Samothrace, and the Dionysiac Mysteries.
Step-by-step explanation:
The tradition of secrecy in fraternities originated from ancient rites of tribal initiation, which were highly secretive all over the world. The specific fraternity from which the tradition of secrecy originated cannot be determined with certainty, as there were various influential mystery cults and secret societies during different periods of history. Some possible candidates include the Eleusinian Mysteries, the Mysteries of Samothrace, and the Dionysiac Mysteries.