Crafting complexity: blade production and socio-economic transitions in Predynastic Heliopolis, Egypt (fourth millennium BCE)

This paper examines the lithic assemblage from Heliopolis to investigate technological practices and socio-economic transitions in Lower Egypt during the Predynastic period. Focusing on blade and bladelet production, it shows that technical traditions are defined not so much by formal tool types as by methods of blank production, core preparation, and knapping techniques. These practices reveal a diverse technological system, shaped by both shared learning frameworks and individual choices. The coexistence of multiple reduction strategies cautions against reliance on typological classification. Material excavated by Schiaparelli in the early twentieth century points to a specialised workshop, where skilled knappers produced blade and bladelet blanks in quantities exceeding domestic needs, whereas recently excavated material from Area 251 suggests more opportunistic, low-skill production. This pattern is consistent with “arbitrary craft specialisation”, in which expertise was unevenly distributed and context-dependent rather than institutionalised. The analysis examines tool curation: while blanks were produced by specialists, retouch and maintenance were carried out by users according to their functional needs, underscoring the entanglement of craft knowledge with subsistence practices. Hammamiya knives, with their standardised forms and wide regional distribution, point to the role of long-distance exchange, itinerant craftspeople, and local imitation. By foregrounding chaînes opératoires and the spatial organisation of production, this study offers new insight into the socio-economic transformations underlying the emergence of the Egyptian state. More broadly, it contributes to comparative debates on craft production and economic complexity, showing how production-centred approaches can refine long-standing anthropological models of specialisation and its social embeddedness.