Writing system
Writing systems were preceded by proto-writing, systems of ideographic and/or early mnemonic symbols. The best known examples are:The invention of the first writing systems is roughly contemporary with the beginning of the Bronze Age in the late Neolithic of the late 4th millennium BC. The Sumerian archaic cuneiform script and the Egyptian hieroglyphs are generally considered the earliest writing systems, both emerging out of their ancestral proto-literate symbol systems from 3400 to 3200 BC with earliest coherent texts from about 2600 BC. It is generally agreed that Sumerian writing was an independent invention; however, it is debated whether Egyptian writing was developed completely independently of Sumerian, or was a case of cultural diffusion.
Cucuteni–Trypillia culture
The mainstream academic theory is that writing first appeared during the Sumerian civilisation in southern Mesopotamia, around 3300–3200 BC. in the form of the Cuneiform script. This first writing system did not suddenly appear out of nowhere, but gradually developed from less stylised pictographic systems that used ideographic and mnemonic symbols that contained meaning, but did not have the linguistic flexibility of the natural language writing system that the Sumerians first conceived. These earlier symbolic systems have been labelled as proto-writing, examples of which have been discovered in a variety of places around the world, some dating back to the 7th millennium BC.