Albert Barnes Commentary 1 Kings 4:1

"And king Solomon was king over all Israel." — 1 Kings 4:1 (ASV)

Solomon was king over “all Israel” from the beginning, unlike David, who for seven and a half years reigned over Judah only. This distinction serves as a fitting introduction to the glory of Solomon and the organization of his court, which the historian proceeds to sketch in this chapter. Solomon appointed certain “princes” or officers of the first rank, who derived their position from him and probably held it at his pleasure.