History of the world
Whether in prehistoric or historic times, people always needed to be near reliable sources of potable water. Settlements developed on river banks as early as 3000 BCE in Mesopotamia, on the banks of Egypt's Nile River, in the Indus River valley, and along China's rivers. As farming developed, grain agriculture became more sophisticated and prompted a division of labour to store food between growing seasons. Labour divisions led to the rise of a leisured upper class and the development of cities, which provided the foundation for civilization. The growing complexity of human societies necessitated systems of accounting and writing.
Natufian culture
The Epipaleolithic Natufian culture () existed from around 12,000 to 9,500 BC or 13,050 to 7,550 BC in the Levant, a region in the Eastern Mediterranean. The culture was unusual in that it supported a sedentary or semi-sedentary population even before the introduction of agriculture. The Natufian communities may be the ancestors of the builders of the first Neolithic settlements of the region, which may have been the earliest in the world. Natufians founded Jericho which may be the oldest city in the world. Some evidence suggests deliberate cultivation of cereals, specifically rye, by the Natufian culture, at Tell Abu Hureyra, the site of earliest evidence of agriculture in the world. The world's oldest evidence of bread-making has been found at Shubayqa 1, a 14,500 year old site in Jordan's northeastern desert. In addition, the oldest known evidence of beer, dating to approximately 13,000 BP, was found at the Raqefet Cave in the Carmel Mountains near Haifa in Israel, in which it was used by the semi-nomadic Natufians for ritual feasting.