What is the name of the era that began with the emergence of the first states?

This era can be called the Ancient World or the Bronze Age. It came in 4 thousand BC. Then the first civilizations began to form, followed by the emergence of the first states. The very first ancient civilizations include: China, Sumer, Egypt, India, etc. The most ancient was Sumer. The habitat of the Sumerian civilization was the lands of Mesopotamia. Here, between the Tigris and Eurfates rivers, the ancient Sumerians founded their cities and were engaged in agriculture.