Subject
Engineering
Engineering. The design and construction of works and machines to a calculated purpose — structures, mechanisms, water systems, and the measurement and testing that make them reliable. The Atlas anchors the subject at Giza, around 2600 BCE, where the Fourth Dynasty pyramids demand surveying, leveling, quarrying, transport, and labor organization at a scale no earlier project approaches. The anchor is arguable, and the audit says so: the irrigation works of Mesopotamia are three thousand years older and require the harder skill, since a canal holding its gradient over five kilometers cannot be built by eye. Giza is the more monumental case; irrigation is the earlier and perhaps the better one.