I’m not discussing any other councils. I’m saying that these two particular Councils, Hippo and Carthage, were incredibly important ones, dealing as they did with the Canon of Scripture, and determining which books were to be included in the Bible.
This was an issue which surely concerned the universal Church very deeply - you couldn’t have different Bibles floating around in different places, could you? We all know what massive problems the different canons cause even today.
So it was an issue which they would want to be resolved by the highest possible authority so as to have unanimous (or as near as possible) teaching on the issue. In other words what they needed was inerrant and infallible teaching.
And that in their quest for this highest possible authority, this inerrant and infallible teaching, they *only *bothered to seek the approval of the See of Rome and not any of the other Apostolic Patriarchs. Which is a very striking omission when one considers the ease with which they could at least have consulted with Alexandria in the event that Rome’s authority or supremacy was in doubt in any way. Not that location is a decisive factor, more of an interesting and telling sidenote.
The critical fact is that Rome’s authority and supremacy were NOT in any doubt - Rome and Rome alone could authoritatively endorse a Canon of Scripture which was intended to bind the whole universal church. Surely that would come under the heading of a teaching of Christ protected by His Holy Spirit (in other words infallible and part of the deposit of faith?)
Now not all the churches, as we know, accepted or accept Rome’s authority or the canon of Hippo and Carthage, just as they didn’t all accept any of the other Councils - quite probably not even the Council of Jerusalem mentioned in Scripture was universally accepted! Doesn’t change the fact that the Pope had the authority to ratify that Canon just as the Apostles had authority to ratify their decisions made in the Council in Jerusalem.