Mark Antony was amassing political support, but Octavian still had opportunity to rival him as the leading member of the faction supporting Caesar.
Mark Antony had lost the support of many Romans and supporters of Caesar when he initially opposed the motion to elevate Caesar to divine status.
Philippus never had much of an interest in young Octavius.
Because of this, Octavius was raised by his grandmother, Julia, the sister of Julius Caesar.
He rejected monarchical titles, and instead called himself Princeps Civitatis ("First Citizen of the State").
The resulting constitutional framework became known as the Principate, the first phase of the Roman Empire.
Due to the crowded nature of Rome at the time, Octavius was taken to his father's home village at Velletri to be raised.