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.
Macedonia (Greece)
Macedonia lies at the crossroads of human development between the Aegean and the Balkans. The earliest signs of human habitation date back to the palaeolithic period, notably with the Petralona cave in which was found the oldest yet known European humanoid, "Archanthropus europaeus petraloniensis". In the Late Neolithic period (c. 4500 to 3500 BC), trade took place with quite distant regions, indicating rapid socio-economic changes. One of the most important innovations was the start of copper working.