The historical interval that separated these two events is treated as naturally dividing itself into three great periods—those of Moses, David and Ezra. The periods are externally indicated by the successive names by which the chosen people were called—Hebrews, Israelites, Jews. The events prior to the exodus are relegated by Ewald to a preliminary chapter of primitive history; and the events of the apostolic and post-apostolic age are treated as a kind of appendix. The entire construction of the history is based on a critical examination and chronological arrangement of the available documents.