The demographic history of Palestine refers to the study of the historical population of the region of Palestine, which approximately corresponds to modern Israel and the Palestinian territories. Iron Age A study by Yigal Shiloh of The Hebrew University suggests that the population of Palestine in the Iron Age could have never exceeded one million. He writes: "... the population of the country in the Roman-Byzantine period greatly exceeded that in the Iron Age..." Shiloh accepted Israeli archaeologist Magen Broshi's estimates of Palestine's population at 1,000,000-1,250,000 and noted that Iron Age Israel's population must have been less considering population growth. "...If we accept Broshi's population estimates, which appear to be confirmed by the results of recent research, it follows that the estimates for the population during the Iron Age must be set at a lower figure." One study of population growth from 1,000 BCE to 750 BCE estimated the Jewish population of Palestine (Judah and Israel) had an average natural growth of 0.4 per cent per annum. Persian period Both the Babylonian conquest and the period of Achaemenid rule witnessed notable drops in the population of Jerusalem, the Shephelah and the Negev region, while a continuity is maintained in the northern Judean and Benjamin areas. As early as the fall of Judah, a substantial Edomite population is attested in southern Judah. When the kingdom of Edom itself succumbed, those people continued its traditions in the south, which the Arabic-speaking Qedarites controlled. Along the coastal region the Phoenician presence expanded, while the Cisjordan underwent demographic change with the inflow of Moabite and Ammonite refugees, while the southern part of Judea underwent substantive change with the settlement of Edomites. The exilic returnees resettled, perhaps with a heightened sense of their ethnic identity. Hellenic and Hasmonean period The Achaemenid Empire was conquered by Alexander the Great in the 330s BC. By this time, an administrative unit (ὕπαρχεία) called Idumea, which appears to link the Iron Age kingdom of Edom with the area west of the Dead Sea, extended over the Arad and Beersheba valleys, the southern Shephelah and the southern Judean hills In 160 BCE the continuing Hellenisation of Palestine led to the Maccabean revolt. The composition of the population, from the end of the Hasmonean dynasty had a large preponderance of Jewish elements compared to strictly localized Greek (pagan) centres, together with a dominant Samaritan enclave in Samaria. Roman and Byzantine period