The transition from the late 4th millennium BCE to the Bronze and Iron Ages along the northern and southern slopes of the Alborz Mountains is a major topic in archaeology, closely linked to the emergence of urbanism. Archaeological research indicates that with the end of Sialk III, many settlements, including those on the Qazvin Plain, collapsed. Similar processes occurred during the early 3rd millennium BCE in regions such as Kashan and Tehran. Although new settlements appeared in the Qazvin Plain during the later 3rd millennium BCE, the areas of Tehran, Qomrud, and Kashan were reoccupied only after a significant gap. In contrast, the northern flank of the Alborz displays a settlement history distinct from that of the southern side. While evidence for the influence of Sialk III in the north is limited, substantial occupation during the 3rd millennium BCE suggests divergent cultural developments on the two sides of the Alborz. This study draws on archaeological data from excavations and surveys in the northern and southern Alborz Mountains to examine Bronze Age (3rd millennium BCE) cultural developments. It highlights interaction networks linking the Gorgan Plain, southern Turkmenistan, Mazandaran, northeastern Iran, and the Central Plateau through exchanges of raw materials, technologies, and pottery traditions. Evidence from sites such as Tepe Hissar, Tureng Tepe, Ghal e-Ben, Ghal e-Kash, Tepe Kalar, and Qoli Darvish demonstrates cultural diversity, overlapping ceramic traditions, and continuous or discontinuous occupational sequences. The article emphasizes a contrast between the cultural hiatus of the Iranian Central Plateau and the flourishing development of the northern Alborz, particularly eastern Mazandaran and the Gorgan Plain, where regional interaction networks expanded. By contrast, the southern Alborz reflects migration, settlement disintegration, and environmental adaptation. Overall, the study identifies the Central Alborz as a key corridor for cultural interaction and interregional networks during the Bronze Age.

Stamp seals constitute one of the most enduring elements of administrative traditions in the Central Zagros of western Iran. However, the uneven archaeological record has generated ongoing debate regarding continuity and discontinuity in their use, particularly during the late fourth and early third millennia BCE, when securely stratified evidence remains limited. Drawing on newly published materials from Tepe Tyalineh, Godin Tepe, Chogha Maran, and Dehsavar, this study reassesses the evolution of stamp seal traditions between ca. 5000 and 2500 BCE within an updated regional chronological framework. By examining the style, iconography, and archaeological contexts of stamp seals and seal impressions from a comparative perspective, the article evaluates competing interpretations of the development of administrative practices in the Central Zagros. The evidence indicates that stamp seals and seal impressions were employed in the region from the Early Chalcolithic (5000–4600 BCE) through Late Chalcolithic phases 1–3 (4600–3700 BCE), during which they continued to develop locally while interacting with broader supra-regional networks. Although the archaeological record suggests an apparent gap during Late Chalcolithic phases 4–5 (3700–3100 BCE), stamp seal traditions persisted into the Early Bronze Age (3100–2500 BCE). While these traditions underwent significant transformation and were increasingly overshadowed by cylinder seals and supra-regional administrative systems during the later fourth millennium BCE, they nevertheless continued to play a role in local administrative practices in the Early Bronze Age. The analysis suggests that this apparent gap is more plausibly explained by biases in archaeological visibility, preservation, excavation coverage, and chronological resolution than by an actual interruption in the production and use of stamp seals. Overall, the study supports a model of relative continuity accompanied by stylistic, iconographic, and administrative transformation within the Central Zagros glyptic tradition. These findings underscore the active role of Central Zagros communities in the development of administrative practices and contribute to broader discussions of cultural continuity, interregional interaction, and the emergence of sociopolitical institutions in prehistoric Southwest Asia.