Changes

[[File:Yemen landscape 05.jpg|thumbnail|left|Figure 1. Example of terraces in Arabia, perhaps similar to those developed already by the Neolithic]]

The history of water use and technologies to bring water to human societies is long, particularly in some of the world's most arid regions where human settled societies first began. Technologies of water also evolved as other technologies developed and social organization and states changed. While we often think of Roman aqueducts as a great marvel, which they were, other complex water technologies, just as complex, existed before.