In Goussainville, the hamlet of Vieux-Pays has remained frozen since the 1970s, deserted due to the deafening noise of planes from Roissy. On the island of Réunion, the former sanatorium of Bellepierre, once a flagship in the fight against tuberculosis, is falling into ruin, a victim of the evolution of medical treatments.
Entire castles, whether municipal or private properties, are neglected due to a lack of funds for restoration. Some train stations, closed after decades of service, deteriorate in silence despite their remarkable architecture.
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Where are the abandoned places in France hidden? A geography of silence and forgetfulness
The map of France reveals, region by region, a patchwork of genetic zones whose richness is not due to chance. The North, the Centre, Brittany, and the Basque Country display distinct profiles, uncovered through careful study of surnames, blood groups, and certain genetic markers. Each territory carries the memory of ancient linguistic borders and migratory movements, evidence of a French population that has shaped itself over the centuries, never becoming static.
In the South-West, genetic links with Spain are still palpable, while Alsace continues to bear the mark of its historical ties with Germany. Corsica and Brittany also show strong coherence both genetically and linguistically. When comparing this genetic mapping to that of surnames zones, the concordance is striking: names, dialects, and sometimes even family dynamics follow the same lines of fracture.
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The question of the rate of consanguinity in France by region continues to fuel scientific research and societal debates. To give depth to these figures, the report “Consanguinity in France: which regions have the highest rate? – Happy Family” offers a regional panorama of practices of endogamy, migratory flows, and isolation that persist, particularly in certain rural areas of the center or on the fringes of the territory. These regions, less affected by urbanization or large population movements, present rates higher than the national average.
The genetic geography does not stop at administrative boundaries. It embraces valleys, crosses mountains, follows the traces of migrations and linguistic legacies. Cross-referencing data from INSEE with the most recent genetic surveys allows for a sketch of a multiple, contrasting France, where each territory, from the canton to the region, bears the imprint of its past.
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The genetic diversity that characterizes France is neither an accident nor a coincidence: it reflects traces of the past, crossings, separations. Analyses of blood groups, mitochondrial DNA, or Y chromosome highlight regional differences, a direct consequence of ancient migratory movements and multiple influences. The records from INSEE, which catalog over 333,600 names from nearly 23.5 million births between 1891 and 1940, compose a true fresco of family heritage. This transmitted history, often through the paternal line, just like the Y chromosome, has sometimes faded under the effects of displacement and conflicts.
The surnames distance often mirrors the geographical distance: displacement, whether voluntary or forced, shapes both genetics and local culture. The linguistic areas, Occitan, Oïl language, Brittany, Basque Country, or Alsace, structure these heritages, reinforced or weakened by internal migrations, the major upheavals of the 20th century, or rural exodus.
Here are some factors contributing to regional diversity:
- The regional diversity results from a combination of factors: isolation, endogamous practices, social evolutions, and genetic mutations.
- Genetic studies are sometimes limited by sample size or field coverage, hence the need to multiply research by relying on new genotyping methods and the exploitation of old data.
The genetic structure of France, reflecting the structure of surnames, invites a rethinking of the very notion of heritage. Some see it as a wealth to preserve, while others view it as material to reinvent. But, clearly, it remains inseparable from local stories, archives, dialects, and traditions that still shape the face of the country today.
At a time when each region defends its identity, the French genetic map reminds us that diversity is not an abstract concept: it is a living story, inscribed in the flesh and names of those who inhabit it. The question remains how this mosaic will continue to evolve tomorrow.