Kinsman:
The councils of Hippo (393) and Carthage (397) simply expressed, or ratified, what had already become the unanimous judgment of the churches (plural) where those writings were already regarded as divinely inspired and authoritative.
The councils of “churches” or dioceses were organised by The Church.
By the time of these councils, they had already accepted the authority of the church in Rome.
The Council of Hippo, a regional council for some of the bishops in the Diocese of Africa, in 393 AD reaffirmed The Decree of Damasus.(Pope St. Damasus I)
Carthage, unlike Hippo, sent its decisions to Rome for ratification. Pope St. Boniface I (418-422) ratified the decision and declared the canon settled for the Western Patriarchate
“Besides the canonical Scriptures, nothing shall be read, in the church under the title of divine writings.’. The canonical books are:—Genesis, Exodus, Leviticus, Numbers, Deuteronomy, Joshua, Judges, Ruth, the four books of Kings, the two books of Paraleipomena(Chronicles), Job, the Psalms of David, the five books of Solomon, the twelve books of the (Minor) Prophets, Isaiah, Jeremiah, Daniel, Ezekiel, Tobias, Judith, Esther, two books of Esdras, two books of the Maccabees. The books of the New Testament are:—the four Gospels, the Acts of the Apostles, thirteen Epistles of S. Paul, one Epistle of S. Paul to the Hebrews, two Epistles of S. Peter, three Epistles of S. John, the Epistle of S. James, the Epistle of S. Jude, the Revelation of S. John. Concerning the confirmation of this canon, the transmarine Church shall be consulted.”
Council of Hippo, Canon 36 (A.D. 393), in HCC,2:400
“[It has been decided] that nothing except the Canonical Scriptures should be read in the church under the name of the Divine Scriptures. But the Canonical Scriptures are:Genesis, Exodus, Leviticus, Numbers, Deuteronomy, Josue, Judges, Ruth, four books of Kings, Paraleipomenon two books, Job, the Psalter of David, five books of Solomon, twelve books of the Prophets, Isaias, Jeremias, Daniel, Ezechiel, Tobias, Judith, Esther, two books of Esdras, two books of the Maccabees. Moreover, of the New Testament: Four books of the Gospels, the Acts of the Apostles one book, thirteen epistles of Paul the Apostle, one of the same to the Hebrews, two of Peter, three of John, one of James, one of Jude, the Apocalypse of John.”
Council of Carthage III,Canon 47(A.D. 397),in DEN,39-40
If they were unanimous in their decision to accept the divinely inspired writings, why did the Protestants reject some of these divinely inspired books 1000 years later? Is it because they had disagreed with what was wriiten in those rejected books?