The Origin of the Etruscans Sept 24, 2021 20:25:54 GMT
Post by Admin on Sept 24, 2021 20:25:54 GMT
The Etruscan civilization, which flourished during the Iron Age in central Italy, has intrigued scholars for millennia. With remarkable metallurgical skills and a now-extinct, non-Indo-European language, the Etruscans stood out from their contemporary neighbors, leading to intense debate from the likes of the ancient Greek historian Herodotus on their geographical origins.
Now, a new study by a team of scholars from Germany, Italy, U.S., Denmark and the U.K., sheds light on the origin and legacy of the enigmatic Etruscans with genome-wide data from 82 ancient individuals from central and southern Italy, spanning 800 BCE to 1000 CE. Their results show that the Etruscans, despite their unique cultural expressions, were closely related to their italic neighbors, and reveal major genetic transformations associated with historical events.
Fig. 4. Genetic placement and modeling of Iron Age and Imperial period individuals.
During the first half of the first millennium CE, we observe a marked shift in PCA space of all studied individuals toward the Near Eastern cline (Fig. 4A), distributed across the genetic space occupied by present-day southeastern European populations. We grouped nonoutlier individuals dating between 1 and 500 CE into the “C.Italy_Imperial” cluster (table S2A). Formal f4-tests reveal its higher affinity than C.Italy_Etruscan to ancient groups from Iran, Africa, and the Near East (table S2C). We then used qpAdm to quantify this group’s ancestry components, where C.Italy_Imperial was modeled as a mixture of the sources C.Italy_Etruscan and 158 published European and Near Eastern genomes from the Bronze and Iron Ages. As a result, the models that were found to fit the data best are those with a 38 to 59% contribution from Levantine or Anatolian populations into the local/preexisting C.Italy_Etruscan gene pool (Fig. 4B and table S4D). Substantial gene flow from the eastern Mediterranean was also reported in ancient individuals from Rome dated to the Imperial period (17). Despite our limited number of data points from the first five centuries CE, the new results suggest that the contribution of nonlocal ancestry in Rome was larger than in Etruria (Fig. 4A). However, this large-scale genetic impact of incoming groups during the Imperial period was not only limited to the metropolitan area around Rome but also extended into the neighboring and more distant regions considered here.
An intriguing phenomenon
With an extinct language that is only partly understood, much of what was initially known about Etruscan civilization comes from the commentary of later Greek and Roman writers. One hypothesis about their origins, the one favored by Herodotus, points to the influence of ancient Greek cultural elements to argue that the Etruscans descended from migrating Anatolian or Aegean groups. Another, championed by Dionysius of Halicarnassus, proposes that the Etruscans originated and developed locally from the Bronze Age Villanovan culture and were therefore an autochthonous population.
Although the current consensus among archaeologists supports a local origin for the Etruscans, a lack of ancient DNA from the region has made genetic investigations inconsistent. The current study, with a time transect of ancient genomic information spanning almost 2000 years collected from 12 archaeological sites, resolves lingering questions about Etruscan origins, showing no evidence for a recent population movement from Anatolia. In fact, the Etruscans shared the genetic profile of the Latins living in nearby Rome, with a large proportion of their genetic profiles coming from steppe-related ancestry that arrived in the region during the Bronze Age.
Considering that steppe-related groups were likely responsible for the spread of Indo-European languages, now spoken around the world by billions of people, the persistence of a non-Indo-European Etruscan language is an intriguing and still unexplained phenomenon that will require further archaeological, historical, linguistic and genetic investigation.
"This linguistic persistence, combined with a genetic turnover, challenges simple assumptions that genes equal languages and suggests a more complex scenario that may have involved the assimilation of early Italic speakers by the Etruscan speech community, possibly during a prolonged period of admixture over the second millennium BCE," says David Caramelli, Professor at the University of Florence.
Periods of change
Despite a few individuals of eastern Mediterranean, northern African, and central European origins, the Etruscan-related gene pool remained stable for at least 800 years, spanning the Iron Age and Roman Republic period. The study finds, however, that during the subsequent Roman Imperial period, central Italy experienced a large scale genetic shift, resulting from admixture with eastern Mediterranean populations, which likely included slaves and soldiers relocated across the Roman Empire.
"This genetic shift clearly depicts the role of the Roman Empire in the large-scale displacement of people in a time of enhanced upward or downward socioeconomic and geographic mobility," says Johannes Krause, Director at the Max Planck Institute for Evolutionary Anthropology.
Looking at the more recent Early Middle Ages, the researchers identified northern European ancestries spreading across the Italian peninsula following the collapse of the Western Roman Empire. These results suggest that Germanic migrants, including individuals associated with the newly established Longobard Kingdom, might have left a traceable impact on the genetic landscape of central Italy.
In the regions of Tuscany, Lazio, and Basilicata the population's ancestry remained largely continuous between the Early Medieval times and today, suggesting that the main gene pool of present-day people from central and southern Italy was largely formed at least 1000 years ago.
Although more ancient DNA from across Italy is needed to support the above conclusions, ancestry shifts in Tuscany and northern Lazio similar to those reported for the city of Rome and its surroundings suggests that historical events during the first millennium CE had a major impact on the genetic transformations over much of the Italian peninsula.
"The Roman Empire appears to have left a long-lasting contribution to the genetic profile of southern Europeans, bridging the gap between European and eastern Mediterranean populations on the genetic map of western Eurasia," says Cosimo Posth, Professor at the University of Tübingen and Senckenberg Centre for Human Evolution and Palaeoenvironment.
Bronze Age migrations changed societal organization, genomic landscape in Italy
More information: The origin and legacy of the Etruscans through a 2000-year archeogenomic time transect, Science Advances (2021). DOI: 10.1126/sciadv.abi7673