Edom at that time. Archaeological investigations indicate that Edom reached statehood only under Assyrian auspices in the seventh century BCE . Before that period it was a sparsely settled fringe area inhabited mainly by pastoral nomads. No less important, Edom was destroyed by the Babylonians in the sixth century BCE , and sedentary activity there recovered only in Hellenistic times. All these indications suggest that the Exodus narrative reached its final form during the time of the Twenty-sixth Dynasty, in the second half of the seventh and the first half of the sixth century BCE . Its many references to specific places and events in this period quite clearly suggest that the author or authors integrated many contemporary details into the story. (It was in much the same way that European illuminated manuscripts of the Middle Ages depicted Jerusalem as a European city with turrets and battlements in order to heighten its direct impact on contemporary readers.) Older, less formalized legends of liberation from Egypt could have been skillfully woven into the powerful saga that borrowed familiar landscapes and monuments. But can it be just a coincidence that the geographical and ethnic details of both the patriarchal origin stories and the Exodus liberation story bear the hallmarks of having been composed in the seventh century BCE ? Were there older kernels of historical truth involved, or were the basic stories first composed then? Challenging a New Pharaoh It is clear that the saga of liberation from Egypt was not composed as an original work in the seventh century BCE . The main outlines of the story were certainly known long before, in the allusions to the Exodus and the wandering in the wilderness contained in the oracles of the prophets Amos ( 2 : 10 ; 3 : 1 ; 9 : 7 ) and Hosea ( 11 : 1 13 : 4 ) a full century before. Both shared a memory of a great event in history that concerned liberation from Egypt and took place in the distant past. But what kind of memory was it? The Egyptologist Donald Redford has argued that the echoes of thegreat events of the Hyksos occupation of Egypt and their violent expulsion from the delta resounded for centuries, to become a central, shared memory of the people of Canaan. These stories of Canaanite colonists established in Egypt, reaching dominance in the delta and then being forced to return to their homeland, could have served as a focus of solidarity and resistance as the Egyptian control over Canaan grew tighter in the course of the Late Bronze Age. As we will see, with the eventual assimilation of many Canaanite communities into the crystallizing nation of Israel, that powerful image of freedom may have grown relevant for an ever widening community. During the time of the kingdoms of Israel and Judah, the Exodus story would have endured and been elaborated as a national saga—a call to national unity in the face of continual threats from great empires. It is impossible to say whether or not the biblical narrative was an expansion and elaboration of vague memories of the immigration of Canaanites to Egypt and their expulsion from the delta in the second millennium BCE . Yet it seems clear that the biblical story of the Exodus drew its power not only from ancient traditions and contemporary geographical and demographic details but even more directly from contemporary political realities. The seventh century was a time of great revival in both Egypt and Judah. In Egypt, after a long period of decline and difficult years of subjection to the Assyrian empire, King Psammetichus I seized power and transformed Egypt into a major international power again. As the rule of the Assyrian empire began to crumble, Egypt moved in to fill the political vacuum, occupying former Assyrian territories and establishing permanent Egyptian rule. Between 640 and 630 BCE , when the Assyrians withdrew their forces from Philistia, Phoenicia, and the area of the former kingdom of Israel, Egypt took over