The village of Mehrgarh, at the foot of the Bolan Pass in what is now western Pakistan, was occupied more or less continuously from around 7000 BCE until the late third millennium BCE. Its long, uninterrupted sequence of mud-brick buildings has made it one of the most important sites for understanding the shift from mobile foraging to settled farming in South Asia. Among the most revealing structures uncovered there are the so-called stone granaries: rectangular, multi-celled buildings with thick internal walls and narrow compartments, first identified during excavations led by Jean-Francois Jarrige in the 1970s.

At first glance these buildings look utilitarian, but their distribution across the site tells a more interesting story. Early granaries were small, placed close to individual dwellings, and their compartments were barely large enough to store the seed required by a single household until the next season. After roughly 5500 BCE, however, the scale of these structures changed. Several compartments were grouped under one roof, walls were reinforced, and the buildings were positioned away from the residential quarters, often on slightly raised platforms. Archaeologist Dr. Shirin Bhatti, who re-examined the site's grain residues in 2014, argues that this shift represents the emergence of communal storage: grain was no longer held exclusively by the household that had harvested it.

Communal storage has significant social consequences. When a portion of each harvest passes through a shared facility, someone must keep track of deposits and withdrawals. At Mehrgarh, small clay tokens of standardised shapes were found in and around the later granaries. Similar tokens from contemporary sites in the Iranian plateau have been interpreted as early accounting devices, and most specialists now accept that the Mehrgarh examples served the same purpose. This implies the existence of people whose role was at least partly administrative, even though no writing system was in use at the site.

The grain itself also changed. Microscopic analysis of the charred seeds shows that the earliest phases were dominated by two-row barley and emmer wheat, both cereals that tolerate poor soils. By the middle phases, six-row barley and bread wheat appear, which produce higher yields but require more reliable irrigation. Dr. Bhatti has suggested that the communal granaries and the new cereals developed together: farmers were willing to risk the more demanding crops only because a shared store could absorb a bad year. A 2019 study by the Centre for Environmental Dynamics in Islamabad tested this idea against climate data reconstructed from lake sediments in nearby Baluchistan, and found that the spread of the higher-yielding cereals coincided with a period of noticeably drier summers.

Not all researchers accept this interpretation. A minority view, advanced by historian Rajiv Menon, is that the large compartmented buildings were not granaries at all but temple storerooms, and that the tokens were ritual offerings rather than administrative records. Menon points out that no cereal residues have been recovered from the central compartments of the largest structures, only from the outer ones. Supporters of the granary interpretation reply that the central compartments were probably cleaned regularly, removing exactly the kind of evidence Menon would like to see.

A second debate concerns who controlled the shared stores. Excavations in the residential quarters have revealed modest differences in house size and in the quality of grave goods, but these differences are small compared with those found at later South Asian sites such as Harappa. For this reason, Dr. Bhatti is cautious about speaking of elites at Mehrgarh. She prefers the term 'stewards': individuals or households who managed the stores on behalf of the community but were not noticeably richer than their neighbours. Whether this arrangement was stable is another question. The granaries were rebuilt at least four times, and each rebuilding enlarged the administrative area slightly, a pattern that some researchers read as the slow accumulation of authority by those who kept the records.

What is clear is that Mehrgarh provides one of the earliest pictures of a community coming to depend on storage. Storage changes what people can plan for. It allows a bad year to be survived, a surplus to be traded, and a festival to be held out of season. It also requires trust, because grain placed in a shared building is grain that the owner no longer watches every day. Seen from this angle, the modest stone compartments of Mehrgarh are not merely containers for cereal: they are the architectural evidence of a society learning to rely on its own institutions.