David is really the hero of both 1 and 2 Chronicles. The heart of Chronicles is the rise of David and the establishment of the Davidic kingdom, which begins with chapter 11.
"They [1 and 2 Chronicles] look forwardwith anticipation to the coming King who will bring in God's final salvation and blessing."43
"The principle point we wish to emphasize is that the Chronicler, the composer of the original work, structured his history around the figure of David and his dynasty, focusing attention on the religious activity of the monarch and his successors."44
"David's heroic personality exemplifies the success that God bestows on those who trust in him, whether in the Chronicler's time or any other."45
In 1 Chronicles the writer documented David's greatness as God's faithful vice-regent. In 2 Chronicles he evaluated all David's successors in terms of his successes. In the chapters that unfold the writer wove his hope for Israel's future together with God's love as demonstrated in His past faithfulness to produce faith and obedience in his readers.
David's eventual coronation was inevitable because God had chosen him as king long before Saul died. The Chronicler began his history of David with his coronation over all 12 tribes. This fact probably reflects the writer's concern for the unity of God's chosen people. The people recognized David as the suitable king because he had led Israel. Furthermore God had anointed him to shepherd the people (his function) and to be prince over them (his office under Yahweh, vv. 1-2). David's elevation happened as God had announced through Samuel (v. 3). God was leading the nation. These verses provide solid evidence that David, not Saul, was God's choice as king of Israel.
David's capture of Jerusalem was foundational to all the political and religious events that followed. The earliest reference to Jerusalem (Salem) that archaeologists have found so far occurs in the Ebla tablets that date from about 2400 B.C. Joab's deed shows he was a mighty warrior. By fortifying Jerusalem David established a secure base of operations at a politically neutral site between Israel and Judah. This led to his succeeding, though the real reason for his greatness was that the Lord of Armies was with him. God was with David because David was with God as well as because God had chosen David as His vice-regent.