At what stage in the organization of society did writing appear among the Egyptians and Sumerians?

Among the Egyptians, as well as among the ancient Sumerians, writing arose approximately in 4-3 thousand BC. In the beginning, it was cuneiform, which was represented by a set of signs and drawings. In the early periods, clay tablets were used to preserve and record information, on which symbols were squeezed out or carved. Thus, the ancient bookkeeping and other records were kept in ancient Egypt and Sumer. Later, scrolls appeared. Egypt made them from the Cyperus plant and such a scroll was called – Papyrus.