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.
History of Western civilization before AD 500
The civilizations of Classical Greece (Hellenic) and Roman Empire (Latin) as well as Ancient Israel (Hebraism) and early Christendom are considered seminal periods in Western history;. From Ancient Greece sprang belief in democracy, and the pursuit of intellectual inquiry into such subjects as truth and beauty; from Rome came lessons in government administration, martial organization, engineering and law; and from Ancient Israel sprang Christianity with its ideals of the brotherhood of humanity. Strong cultural contributions also emerged from the pagan Germanic, Celtic, Wendic, Finnic, Baltic and Nordic peoples of pre-Christian Europe. Following the 5th century Fall of Rome, Europe entered the Middle Ages, during which period the Catholic Church filled the power vacuum left in the West by the fallen Roman Empire, while the Eastern Roman Empire (Byzantine Empire) endured for centuries.