Within that broad period, communities across the Fertile Crescent showed a remarkable range of behaviors: some were highly mobile; others had begun to establish more permanent base camps and return to the same locations season after season; some were already experimenting with the cultivation or management of wild plant species; most were still primarily dependent on hunting and gathering for their food supply.

The old picture of these people as simple nomads wandering in small bands has been substantially revised by decades of research.

PPN communities built substantial structures, maintained long-distance trade and exchange networks across hundreds of kilometers, produced sophisticated stone tools using techniques refined over thousands of years, and — as Göbekli Tepe makes viscerally clear — were capable of large-scale cooperative projects requiring sustained organization, specialized skill, and shared purpose.

The hillside now occupied by the mound of Göbekli Tepe sits within a limestone plateau that would have been recognizable, in its broad outlines, to any geologist or hiker: eroded ridges, shallow valleys, thin soils over bedrock, the kind of landscape that retains some woodland but transitions easily to open scrub.