Well it was kind of a social contract, and it was primarily the Greek slaves who achieved manumission, starting from a position of parity in cultural and racial

Well it was kind of a social contract, and it was primarily the Greek slaves who achieved manumission, starting from a position of parity in cultural and racial perception (we're speaking purely in terms of their status in the Mediterranean as a people with greatness, with the legacy of a great history which in general is the consequence of being conquerors), and usually an advantage in most intellectual matters. In the intellectual the Roman shone in oratory, law, civil engineering, and others I forget. There are many where the Romans were considered the best. But Greek language was of greater prestige in the highest circles of Rome, for instance the last words of Gauis Julius Caesar were in Greek, tutors had to be Greek, and Greek slaves played, under working conditions enviable even by many Americans in the 21st century, an essential part in the production of the Aeneid, which was the equivalent of the time of a major motion picture, and which involved extensive cryptography. Cryptographic techniques of the time were used to conceal its true message for thousands of years, while ensuring there was enough fidelity in the whole work to ensure the message could be conveyed. What this meant in practice is the Greeks serving Virgil had to count sounds in verses by applying certain rules to the characters, and count with absolute certainty. Coming full circle, for such great undertakings that required such great secrecy to conceal the message from the Emperor the slave's loyalty could really only be bought with the sound promise of freedom.