Strontium Isotopes Reveal Who Moved Through Bronze Age Greece

A sweeping isotopic investigation of human remains from Bronze Age Greece has revealed that a steady stream of foreigners lived and died in ancient communities across the region, and that their movement defied many of the assumptions archaeologists have long held about prehistoric migration. The study, published in the journal PLOS One by researchers affiliated with the University of Gothenburg and international collaborators, analyzed the strontium isotope composition of 199 individuals excavated at six archaeological sites in central and southern Greece. The results show that between five and ten percent of the people buried in each of the studied communities grew up somewhere else, a consistent proportion that persisted across the Bronze Age and across communities of very different character.

The research forms part of The Rise II project, a large-scale initiative based at the University of Gothenburg that seeks to reinterpret key processes of European prehistory by integrating ancient DNA, isotopic investigations, linguistics and archaeology. Within that framework, the new paper, titled Exploring mobility in Bronze Age Greece: A Sr isotope perspective, set out to answer two deceptively simple questions: how did human mobility change throughout the Bronze Age, and whether the movement of people was driven by specific identifiable factors. The answers, according to the team, complicate a picture that earlier scholarship had painted in broad and often gendered strokes.

The analytical foundation of the study rests on a well-established principle of geochemistry. Strontium enters the human body through water and food, both of which are typically gathered from the immediate environment in premodern societies. Because the strontium isotope signature of a landscape reflects the age and composition of its underlying geology, that signature is transferred into human bones and teeth during growth and mineralization. Dental enamel, which forms in childhood and does not subsequently remodel, preserves the isotope composition of the place where a person spent their early years. By comparing the values measured in skeletal samples against so-called bioavailable baselines established for the region surrounding each burial site, researchers can determine with a significant degree of certainty whether an individual was local or grew up elsewhere.

Applying this method to 199 individuals from six sites, the team found that non-local people were present in every community examined. The consistency of the figure, holding at roughly five to ten percent across the sampled populations, suggests that foreign-born residents were a normal and enduring feature of Bronze Age Greek society rather than an occasional anomaly tied to a single period or place. The Mediterranean world of the third and second millennia BCE witnessed profound socio-cultural and economic transformations, varying across regions and over time, and expanding exchange networks are known to have played an important role in these developments. What remained poorly understood until now was the extent to which the movement of goods was accompanied by the migration and settlement of foreign individuals within local communities.

One of the study’s most striking findings concerns gender. Previous research has often suggested that women were more likely to move between communities, particularly through marriage in patrilineal societies, a pattern documented in various prehistoric contexts and widely invoked to explain the spread of technologies and styles. The new data do not support such a one-sided picture for Bronze Age Greece. The number of non-local women and men proved to be comparable, indicating that several different factors, rather than marriage alone, may have driven an individual’s mobility. As Serena Sabatini, associate professor of archaeology at the University of Gothenburg, noted, this balance suggests a more complex set of motivations behind movement, potentially including trade, craft specialization, diplomatic exchange and other forms of contact that the expanding Bronze Age networks encouraged.

Status, too, appears to have had little bearing on who moved. Non-local individuals were identified across different burial practices, appearing both in unremarkable graves and in richly furbished ones. This distribution reveals that people were mobile regardless of their wealth or social standing, and that foreigners were integrated into their adopted communities to the point of receiving burial treatment consistent with local norms. For archaeologists, the finding is significant because burial opulence is often used as a proxy for social hierarchy; the new evidence shows that a wealthy grave could belong to someone born far away just as easily as to a member of the local elite, and that mobility was not the privilege of a mobile merchant class alone.

The age profile of the migrants adds another layer of nuance. No foreigners were identified among the investigated children, which is to say that the youngest individuals in the sample all carried isotope signatures matching their burial regions. Young adults under the age of thirty, by contrast, were the group most likely to be non-local. Taken together, these patterns suggest that mobility and migration in Bronze Age Greece concerned, to a considerable extent, single young individuals rather than the relocation of entire families. Whether these young movers arrived as traders, craftspeople, marriage partners, or in other capacities, the data indicate that they arrived as individuals and were buried within the communities that received them.

The methodological strength of the study lies in its scale and its grounding in regional baselines. Strontium isotope analysis has become one of the most powerful tools in modern archaeology precisely because it sidesteps the assumptions embedded in grave goods or architectural styles, which can travel through trade without any human movement at all. By measuring the isotope ratios directly in human tissue, researchers gain a biological record of where a person drew their food and water during the years their skeleton was forming. The 199 skeletal samples analyzed here, drawn from excavations across central and southern Greece, allowed the team to track how mobility behaved across both space and time within the Bronze Age, rather than relying on isolated case studies that might reflect local idiosyncrasies.

The broader implications reach well beyond the Aegean. The Bronze Age Mediterranean is often narrated as a world connected by the exchange of metals, textiles and prestige goods, with palatial centers in the Aegean, the eastern Mediterranean and beyond linked by maritime routes. The new findings demonstrate that this connectivity had a human dimension that was demographically meaningful yet socially diffuse: a small but persistent fraction of every community was foreign-born, drawn from both sexes and all levels of wealth. Such a pattern implies that prehistoric exchange networks did not merely move objects between distant elites but also moved people into the everyday fabric of local life, where they lived, worked and were eventually buried alongside their neighbors.

The study also serves as a corrective to lingering stereotypes about prehistoric societies. The assumption that women moved and men stayed, rooted in models of patrilineal marriage exchange, has shaped interpretations of genetic and archaeological data across Europe. By showing comparable numbers of non-local men and women in Bronze Age Greece, the Gothenburg-led team argues that mobility was a multifaceted phenomenon, produced by a range of social and economic forces that varied from person to person. The research, published open access in PLOS One on 23 September 2026, offers a template for future work across the Mediterranean and Europe, where the combination of large skeletal samples, regional isotope baselines and archaeological context promises to reveal, community by community, how the ancient world was knit together not only by goods and ideas but by the quiet, persistent movement of people themselves.

Subject of Research: Bronze Age human mobility in Greece determined through strontium isotope analysis of skeletal remains

Article Title: New study reveals Bronze Age mobility across ancient Greece

Article References: New study reveals Bronze Age mobility across ancient Greece. (n.d.). Original publication

Image Credits: AI Generated

DOI: Not provided

Keywords: Bronze Age, Greece, strontium isotopes, archaeology, human mobility, migration, PLOS One, University of Gothenburg, Mediterranean, isotope analysis, burial practices, ancient DNA