What was the most important invention of the Ancient World?

The most important event of the ancient era was the invention of writing. Writing itself arose around 4 thousand BC. Thanks to her, the first states were able to arise. On the territory of the Ancient East and Egypt, cuneiform and hieroglyphs existed. At the very beginning, ancient people wrote on palm leaves, on the bark of trees, but later clay tablets and papyrus began to be used. The first ink was also invented, which was made from red earth and soot.