Extensive pedigrees reveal the social organization of a Neolithic community.

Social anthropology and ethnographic studies have described kinship systems and networks of contact and exchange in extant populations1-4. However, for prehistoric societies, these systems can be studied only indirectly from biological and cultural remains. Stable isotope data, sex and age at death can provide insights into the demographic structure of a burial community and identify local versus non-local childhood signatures, archaeogenetic data can reconstruct the biological relationships between individuals, which enables the reconstruction of pedigrees, and combined evidence informs on kinship practices and residence patterns in prehistoric societies. Here we report ancient DNA, strontium isotope and contextual data from more than 100 individuals from the site Gurgy 'les Noisats' (France), dated to the western European Neolithic around 4850-4500 BC. We find that this burial community was genetically connected by two main pedigrees, spanning seven generations, that were patrilocal and patrilineal, with evidence for female exogamy and exchange with genetically close neighbouring groups. The microdemographic structure of individuals linked and unlinked to the pedigrees reveals additional information about the social structure, living conditions and site occupation. The absence of half-siblings and the high number of adult full siblings suggest that there were stable health conditions and a supportive social network, facilitating high fertility and low mortality5. Age-structure differences and strontium isotope results by generation indicate that the site was used for just a few decades, providing new insights into shifting sedentary farming practices during the European Neolithic.

How Does Diet Influence Our Lives? Evaluating the Relationship between Isotopic Signatures and Mortality Patterns in Italian Roman Imperial and Medieval Periods.

The present research investigates the relationship between dietary habits and mortality patterns in the Roman Imperial and Medieval periods. The reconstructions of population dynamics and subsistence strategies provide a fascinating source of information for understanding our history. This is particularly true given that the changes in social, economic, political, and religious aspects related to the transition from the Roman period to the Middle Ages have been widely discussed. We analyzed the isotopic and mortality patterns of 616 individuals from 18 archeological sites (the Medieval Latium sites of Colonna, Santa Severa, Allumiere, Cencelle, and 14 Medieval and Imperial funerary contexts from Rome) to compile a survivorship analysis. A semi-parametric approach was applied, suggesting variations in mortality patterns between sexes in the Roman period. Nitrogen isotopic signatures influenced mortality in both periods, showing a quadratic and a linear effect for Roman Imperial and Medieval populations, respectively. No influence of carbon isotopic signatures has been detected for Roman Imperial populations. Conversely, increased mortality risk for rising carbon isotopic values was observed in Medieval samples.

[Approach to illness and death of Vadinienses in roman Hispania (I-IV centuries)]. / Aproximación a la enfermedad y muerte de los Vadinienses en la Hispania romana (siglos I-IV).

The Vadinienses were a Cantabrian people who lived between the first and fourth centuries in the north of the Iberian Peninsula, northeast of the present province of León and the corresponding part of the current territory of Asturias. In this paper we study the possible causes of illness and death of the Vadinienses represented in their gravestones. The analysis of Vadinienses epitaphs shows that two-thirds of the deaths occurred in people between the ages of 20-30, a finding that is not interpreted as representative of the usual age of death at that time. The most likely causes of death are infections and violent deaths in sports competitions or work accidents. Analyzing females independently, almost half of the deceased were under the age of 20, being the main possibilities the deaths related to pregnancy and childbirth at very early ages.

Los vadinienses fueron un pueblo cántabro que habitó entre los siglos I y IV en el norte de la península ibérica -noreste de la actual provincia de León y la parte correspondiente de la actual Asturias-. En este trabajo se estudian las posibles causas de enfermedad y muerte de la población vadiniense representada en sus lápidas funerarias. Dos terceras partes de los vadinienses, según los datos de sus epitafios, murieron entre los 20-30 años, hallazgo que no se interpreta como representativo de la edad de muerte habitual en la época. Se consideran como las causas de muerte más probables las infecciones y las muertes violentas en competiciones deportivas o en accidentes laborales. Cuando se analiza de modo independiente al sexo femenino, casi la mitad de las fallecidas lo hicieron antes de los 20 años de edad, valorando como principales posibilidades las muertes relacionadas con embarazos y partos en edades muy precoces.

The end of the Kachemak tradition on the Kenai Peninsula, southcentral Alaska.

The Kachemak tradition was established by ca. 3000 B.P. in Kachemak Bay. Probably somewhat later a variant termed Riverine Kachemak, with a population adapted to salmon and terrestrial resources, appeared on the northern Kenai Peninsula. The Kachemak tradition people seem to have abandoned Kachemak Bay by ca. 1400 B.P. Seven of 12 available Kachemak tradition dates predate 1400 B.P. even at two sigma. Scattered younger dates are thus suspect outliers. The end of Riverine Kachemak tradition has been placed at ca. 1000 B.P., at which time the population was supposedly replaced by in-migrating groups ancestral to the Dena'ina Athapaskans. Close examination of the numerous available radiocarbon dates shows that most Riverine Kachemak dates cluster in the early centuries of the First Millennium A.D. and most Dena'ina dates substantially postdate 1000 A.D. Probably the Riverine Kachemak and Dena'ina peoples never met on the Kenai River. However, the correspondence in date ranges between Kachemak Bay and Riverine Kachemak is striking, suggesting their fates were linked. Both traditions collapsed by 1400-1500 B.P. The causes are probably multiple but do not include cultural replacement.

Lying-in and laying-out: fetal health and the contribution of midwifery.

This article considers the quality of midwifery skills and practice principally in eighteenth-, nineteenth-, and early twentieth-century England. It discusses the merits of assessing effectiveness via differentials and changes in late-fetal rather than maternal mortality. Evidence from the lying-in hospitals, both in-patients and out-patients, in terms of stillbirths and the deaths of mothers and children is set against what is known from demographic studies of the background levels of early-age and maternal mortality. The conclusions emphasize the value of taking a "fetal health" perspective, rather than viewing midwifery simply in terms of maternal well-being. They also note the apparent superiority of London's position compared with the provinces and the steady improvement during the eighteenth century, and lack of progress during the nineteenth; and they reconfirm the particular dangers to mothers delivered as hospital in-patients. Finally, the considerable methodological problems faced by such studies are emphasized.

Social implications of mortality patterns of juveniles from Poundbury Camp, Romano-British Cemetery.

Attempts have been made to reconstruct the Romano-British population that was buried at Poundbury Camp, Dorchester, England. Over 1400 graves were excavated and about 1200 skeletons of adults and juveniles were recovered, dating from the 1st to the 5th Centuries AD. The burial patterns indicate that the family was the important unit in the community that was served by Poundbury Camp. The newborn but perhaps not the stillborn were buried in the cemetery. Infanticide was not practised. Infant mortality was high and weaning may have been at a very early age. There were relatively few children and family sizes must have been small. Among the adolescents there were three times as many girls as boys. This is interpreted as a consequence of the materialism of a society with an agrarian economy.