If not slaves, then who were these workers? Lehner’s friend Zahi Hawass, secretary general of the Supreme Council of Antiquities, who has been excavating a “workers’ cemetery” just above Lehner’s city on the plateau, sees forensic evidence in the remains of those buried there that pyramid building was hazardous business. Why would anyone choose to perform such hard labor? The answer, says Lehner, lies in understanding obligatory labor in the premodern world. “People were not atomized, separate, individuals with the political and economic freedom that we take for granted. Obligatory labor ranges from slavery all the way to, say, the Amish, where you have elders and a strong sense of community obligations, and a barn raising is a religious event and a feasting event. If you are a young man in a traditional setting like that, you may not have a choice.” Plug that into the pyramid context, says Lehner, “and you have to say, ‘This is a hell of a barn!’”

Lehner currently thinks Egyptian society was organized somewhat like a feudal system, in which almost everyone owed service to a lord. The Egyptians called this “bak.” Everybody owed bak of some kind to people above them in the social hierarchy.

That’s literally corvée.