The 25th Century BCE

The 25th century BCE is a period of one hundred years, spanning from 2500 to 2401 BCE. It forms part of what is known as the Early Bronze Age, which saw the flourishing of several major centers: the Nile Valley in Egypt, Sumer in what is now eastern Iraq, the Indus Valley in South Asia, and central China.

The dating of events in this period is not precise. Historians employ three different systems (long, middle, and short) that vary in their chronology of Mesopotamian events by up to a century or more. Consequently, any event attributed to this century is approximate.

Egypt

This century encompasses the end of the Fourth Dynasty and the beginning of the Fifth Dynasty in ancient Egypt. The great pyramids of Giza—particularly those of Khufu, Khafre, and Menkaure—were constructed during this period. Their construction required a complete administrative system: land surveying, transport of stone quarried from Tura and Aswan, and the organization of large workforces coordinated with the Nile's flood seasons. The pharaohs of the Fifth Dynasty intensified the worship of the sun god Ra and built solar temples.

Mesopotamia

In the east, Sumer consisted of competing city-states: Ur, Uruk, Lagash, Umma, Kish, and Nippur. Each possessed a large temple (ziggurat) and a ruler (ensi or lugal). Disputes over water and borders led to constant warfare, notably between Lagash and Umma. Cuneiform writing developed and was used for temple accounting, contracts, and royal inscriptions. The royal tombs at Ur, including that of Puabi, reveal social hierarchy and long-distance trade in gold and lapis lazuli.

Other regions

The Indus Valley produced the cities of Harappa and Mohenjo-daro, featuring gridded street plans, underground drainage systems, and standardized weights and measures. In eastern Europe and the west, megalithic societies built the early stages of Stonehenge and stone burial mounds. In central China, the Longshan culture produced thin-walled black pottery and constructed walled settlements.