We are speaking of James, the Lord's brother, who would become the principal leader of the Church in Jerusalem; the book of Acts does not yet mention him in (Acts 8.1-3). Luke simply writes that "the apostles" remained in Jerusalem, without mentioning James.
Several observations can be made.
James is probably not yet the principal leader of the Church
At the time of the persecution that followed Stephen's death, the authority of the Church was still exercised collectively by the Twelve (Acts 2.42; Acts 4.35; Acts 5.12). James, the brother of Jesus, was certainly already a believer — Jesus appeared to him after His resurrection (1 Corinthians 15.7) — but Luke does not yet assign him a leading role.
He was most probably in Jerusalem
Nothing indicates that James left Jerusalem. On the contrary, when he first appears as an important figure, he is indeed in that city.
After Peter's miraculous deliverance, he says:
“Tell these things to James and to the brethren.” (Acts 12.17)
This remark shows that James was already a figure of reference in the Church in Jerusalem.
His authority then becomes evident
From (Acts 15) onward, at the Council of Jerusalem, James presides over the debates and delivers the conclusion that served as the basis for the Church's decision (Acts 15.13-21). Later, during Paul's last journey to Jerusalem, Paul first meets James, surrounded by the elders of the Church (Acts 21.18).
These passages show that he had become the principal leader of the Church in Jerusalem.
Why does Luke not mention him in Acts 8?
Several explanations are proposed:
- Luke focuses his account on the activity of the apostles, who still officially lead the Church.
- James may already be exercising an important ministry, but his authority is not yet fully established or recognized as such in the narrative.
- Luke introduces characters gradually, as they become decisive for the development of his narrative.
Conclusion
It is therefore very probable that James, the Lord's brother, was indeed in Jerusalem at the time of the persecution of (Acts 8.1-3), but the book of Acts does not yet mention him. His role as principal leader of the Church appears explicitly only from (Acts 12.17) onward and becomes fully evident at the Council of Jerusalem (Acts 15.13-21).
This progression is consistent with the other data of the New Testament: James passes gradually from the status of a close relative of Jesus (John 7.5) to that of a witness of the resurrection (1 Corinthians 15.7), and then to that of a recognized leader of the Church in Jerusalem.