Ancient Mesopotamian religion

Mesopotamian religion was the original religious beliefs and practices of the civilizations of ancient Mesopotamia, particularly Sumer, Akkad, Assyria and Babylonia between circa 6000 BC and 400 AD. The religious development of Mesopotamia and Mesopotamian culture in general, especially in the south, were not particularly influenced by the movements of the various peoples into and throughout the area. Rather, Mesopotamian religion was a consistent and coherent tradition, which adapted to the internal needs of its adherents over millennia of development. The earliest undercurrents of Mesopotamian religious thought are believed to have developed in Mesopotamia in the 6th millennium BC, coinciding with the region beginning to be permanently settled. The earliest evidence of Mesopotamian religion dates to the mid-4th millennium BC, coincides with the invention of writing, and involved the worship of forces of nature as providers of sustenance. In the 3rd millennium BC, objects of worship were personified and became an expansive cast of divinities with particular functions. The last stages of Mesopotamian polytheism, which developed in the 2nd and 1st millennia BC, introduced greater emphasis on personal religion and structured the gods into a monarchical hierarchy, with the national god being the head of the pantheon. Mesopotamian religion finally declined with the spread of Iranian religions during the Achaemenid Empire and with the Christianization of Mesopotamia. Sumerian religion and Babylonian religion The very earliest undercurrents of Mesopotamian religious thought are believed to have developed in the first half of the sixth millennium BC, at the time people first began to permanently settle in Mesopotamia owing to improved irrigation. The early religious developments of the region are unknown since they preceded the invention of writing. The first evidence for what is recogniseably Mesopotamian religion can be seen with the invention in Mesopotamia of writing circa 3500 BC.