Differences between Ezra's and Nehemiah's lists

The table at the end of this post presents, side by side, two lists of the Jews who returned form the Captivity in Babylon during the days of Ezra and Nehemiah, but many discrepancies between the two lists have been pointed out in the past. I have no illusions about explaining authoritatively the reason for these discrepancies, but I intend to:

Simplified Time-line of the Old Testament

The historical narrative of the Old Testament is not uniform — sometimes the narrative flies over centuries in a few verses, sometimes it slows down and takes up a whole book to tell us about a period of thirty days. We will reap great benefits in our study of the OT if we understand this fact, and try and perceive the speed of the narrative.

The graphic below presents a global vision of the historical books of the OT (Genesis to Esther) plotted along a time-line that stretches from the Creation of the world to the birth of Messiah, the Lord Jesus Christ. Some key events (the Flood, the Exodus, etc.) are marked in the time-line, but the main purpose of the graphic is to show the period of time occupied by each book, and the chronological relation between the books.