The (Mis)appropriation of Biological Anthropology in Race Science and the Implications for Forensic Anthropology

Most biological anthropologists acknowledge that phenotypic human variation is distinct from human race. However, there is the potential for the research on human variation to be (mis)interpreted by the public as a reification of biological races. To explore this possible misuse, this study is a content analysis of articles (n = 1146) in the prominent race science journals Mankind Quarterly; The Journal of Social, Political, and Economic Studies; and The Occidental Quarterly. The goal is to investigate how race science employs research in biological and forensic anthropology to justify arguments. Articles were evaluated according to country affiliation, discipline, data sets, racial/ethnic terminology, position on racial hierarchy, position on racial segregation and eugenics, focus of study, views of scientific community, and the average power index (PI). Additionally, specific examples of (mis)appropriation are highlighted. Though the primary discipline represented in these publications is psychology, biological anthropology maintains a presence. Skeletal and dental traits, genetics, and paleoanthropological data are used to argue for biological racial differences and taxonomic distinctions. The research of forensic ancestry estimation was regularly used to legitimize the concept of biological race. While the PIs of the articles are low, they are present on the internet and circulate within social media. The continued use of biological anthropology to reinforce racial essentialism should force practitioners to question the ethical implications of their research. Finally, we provide discussion regarding shiftsin methodology and terminology to address how biological and forensic anthropologists can rectify the damage this research may directly and indirectly cause.

Self-Reported Ancestry and Craniofacial SNPs

Genotype-phenotype studies increasingly link single nucleotide polymorphism (SNPs) to the dimensions of the face for presumed homogeneous populations. To appreciate the significance of these findings, it is essential to investigate how these results differ between the genetic and phenotypic profiles of individuals. In prior work, we investigated the connection between SNPs previously identified as informative of soft tissue expression and measurements of the craniofacial skeleton. Using matched genetic and skeletal information on 17 individuals who self-identified as White with presumed common continental ancestry (European), we obtained significant Spearman correlations for 11 SNPs. In the present study, we looked at self-identified ancestry to understand the intersectional background of the individual’s phenotype and genotype. We integrated our samples within a diverse dataset of 2,242 modern Americans and applied an unsupervised model-based clustering routine to 13 craniometrics. We generated a mean estimate of 69.65% (±SD = 18%) European ancestry for the White sample under an unsupervised cluster model. We estimated higher quantities of European ancestry, 88.5%–93%, for our subset of 17 individuals. These elevated estimates were of interest with respect to the distribution of population-informative SNPs; we found, for example, that one of our sampled self-identified White individuals displayed SNPs commonly associated with Latin American populations. These results underscore the complex interrelationship between environment and genetics, and the need for continued research into connections between population affinity, social identity, and morphogenetic expression.

Ancestry Estimation in Practice

The medicolegal system relies on forensic anthropologists to construct accurate biological profiles from skeletal remainsto narrow the pool of potential missing persons and provide support for positive identifications. The ancestry estimation component of theprofile offers physical descriptions of decedents through a combination of metric analysis and the interpretation of discrete traits believedto correlate with visible physical features. Forensic anthropologists employed in medical examiners’ offices in the United States regularlyconstruct these profiles in casework. However, ancestry estimation methods have been questioned in their ability to accurately describe theracial classification of the deceased. Although validation studies have documented the accuracy of ancestry estimation methods on skeletalcollections, it is unknown how well they operate in forensic casework and the assumption that methods mirror the results observed inacademic research studies remains unproven. In an effort to understand how well methods preform, this research was designed to evaluatethe accuracy ancestry estimation practices within three medical examiners’ offices in the United States. The results show an accuracy rateof 99% among 177 cases when both definitive and ambiguous ancestral and racial terminology was used to describe remains. Becauseunidentified cases lack antemortem information, it remains unknown if the ancestral assessments of the 280 unidentified individualsincluded in this study confer the same level of accuracy shown in resolved cases. The results presented here are informative not only forthe vital statistics obtained, but also for what this data reveals about the factors influencing ancestry estimation in practice.

Explanation of Ancestry Estimation in Forensic Anthropology Textbooks

The way we teach about race and racism can have profound impacts on undergraduate learners, both positive and negative. Textbooks represent a space in which hidden curriculum about race can cement misconceptions and biologically essentialist thinking, leading to the ongoing support of practices that harm racially minoritized populations. In this study, I critically examine five popular introductory level, undergraduate, forensic anthropology textbooks, with attention to chapters on ancestry estimation, and offer recommendations for supplementary or alternative content. Specific coverage of core concepts related to race and ancestry estimation practices in forensic anthropology are evaluated, as well as the order of presentation and consistency of key messages. Though each chapter focuses on distinct examples and approaches, none cover all of the concepts or present a consistent message about ancestry estimation as it pertains to the biological race concept. In particular, messaging within each chapter demonstrates some ambiguity in the distinction between race and ancestry, while also presenting a narrative through which racial typology practices are delineated as “in the past” and distinct from current ancestry estimation practices. These results demonstrate a need, at the undergraduate level, for a more explicit discussion of the biological race myth in lieu of traditional approaches that focus on demonstrating the practicality and validity of such methods. Finally, detailed presentations of ancestry estimation

Craniometric Variation in a Regional Sample from Antioquia, Medellín, Colombia

Population affinity estimation is frequently assessed from measurements of the cranium. Traditional models place individuals into discrete groups―such as Hispanic―that often encompass very diverse populations. Current research, including this study, challenges these assumptions using more refined population affinity estimation analyses. We examine craniometric data for a sample of individuals from different regions in Antioquia, Colombia. We first assessed the sample to understand intraregional variation in cranial shape as a function of birthplace or a culturally constructed social group label. Then, pooling the Colombian data, we compare cranial variation with global contemporary and prehistoric groups. Results did not indicate significant intraregional variation in Antioquia; classification models performed poorly (28.6% for birthplace and 36.6% for social group). When compared to other groups (American Black, American White, Asian, modern Hispanic, and prehistoric Native American), our model correctly classified 75.5% of the samples. We further refined the model by separating the pooled Hispanic sample into Mexican and Guatemalan samples, which produced a correct classification rate of 74.4%. These results indicate significant differences in cranial form among groups commonly united under the classification “Hispanic” and bolster the addition of a refined approach to population affinity estimation using craniometric data.

On WEIRD Anthropologists and Their White Skeletons

Most forensic anthropologists and the populations they study are WEIRD—that is, Western, educated, industrialized, rich, and democratic. In their interventions into the WEIRD, Clancy and Davis (2019) contend that WEIRD is a euphemism for white and that it is the white, Western European–derived scientists and subjects that skew the predominating narrative of the human condition. While they demonstrate how biological anthropology can decenter the WEIRD, it is fruitful to extend their framework specifically to forensic anthropology. We argue that the scientific enterprise of forensic anthropology is unique in that: (1) it is touted as an objective tool that must operate within medicolegal systems, (2) it involves board certification and accreditation standards, and (3) it holds ancestry and race as core to its practice. In a bibliometric survey of journal articles over the past five years (n = 793), we find that up to 79% of authors originate from WEIRD contexts. In articles specifically studying ancestry, European-derived populations are included 88% of the time as a category for comparison to other groups, while only 12% do not include Europeans. Furthermore, 49% of articles unrelated to ancestry use white subjects solely or in part, reinforcing a historic tendency to measure all human variation against one particular norm. We also find that WEIRD articles receive significantly more recognition than non-WEIRD counterparts. In this reflexive and positional exercise, we hope to make visible how whiteness as WEIRDness informs the history, values, and practices of forensic anthropology on a global scale.

Steven A. Symes

Steven A. Symes is primarily known for his scholarly work on skeletal trauma analysis and for his applied casework and frequent courtroom appearances providing forensic anthropology testimony. However, many may not know that throughout his career Steve has also been a proponent of photography and microscopy. This biography serves to introduce some and enlighten others as to how Steve ended up in forensic anthropology, highlighting aspects of Steve as a mentor, colleague, and friend. This manuscript is based on a chat between the authors, with some details filled in via supporting documents and colleagues.

Sex Estimation Using Geometric Morphometrics

Creating and testing efficient techniques for the sex estimation of modern human skeletal remains has been a significant focus in biological anthropology. It is well established that the innominate, particularly the pubic bone, is a sexually dimorphic part of the human skeleton, but prone to fragmentation. Using modern pubic bones of known age and sex, this study aims to capture shape differences using geometric morphometrics (GMM) to test classification accuracy of segments of the pubic bone. The sample consists of 70 left adult pubic bones from the William M. Bass Donated Skeletal Collection, with 35 males and 35 females of mixed age and population affinity. Landmarks were placed on the dorsal surface of the pubic body and ischiopubic ramus to capture their overall shape in two dimensions, so the study is easily replicable and applicable. The scans were separately run through a generalized Procrustes, principal components (PCA), and canonical linear discriminant function analysis (DFA). The DFA results show high classification accuracy for the pubic body (94% males, 100% females) and the ischiopubic ramus (100% females, 97% males), with the PCA DFA allowing a researcher to explore specific shape changes driving the differentiation between groups. GMM was able to quantify and successfully discriminant the shape changes between males and females for small elements of the pubis, which can be applied to fragmentary remains and future morphological methods.

Description and Quantification of Sexual Dimorphism of Pubic Body Shape in Hispanic Populations Using Elliptic Fourier Analysis

Sex estimation is important in the creation of a biological profile for unidentified human remains, as positive identification cannot occur until the decedent’s biological traits have been determined and the range of possible matches has been narrowed. The pubic bone is cited as one of the best indicators of sex due to the constraints of childbirth. Current methods that use the pubic bone for sex estimation, however, rely on poorly defined and subjective observations that are susceptible to inter-and intraobserver error. Additionally, many of the methods currently in use are based on North American populations and thus may not necessarily model the variation seen in other populations around the globe. The aim of this study is to gain a better understanding of variation in pubic bone shape in Hispanic populations by separating the influences of sex, ancestry, and age at death. A total of 164 pubic bones from North American Hispanic and Chilean individuals were compared to 287 pubic bones from individuals of Euro-American ancestry from North American collections, using Elliptic Fourier analysis (EFA) of photographs, principal component analysis, and ANCOVA. EFA generated five effective principal components that collectively describe approximately 95% of the variation in the shape of the pubic body. Sex, age at death, and ancestry were all found to significantly influence shape but explained only 25% of the overall variation. The remaining 75% is likely influenced by variables that cannot be controlled for in anthropological analysis, underscoring how little variance in skeletal morphology is actually explainable.

Food Has No Borders

Isotopic analyses of human remains augment the biological profile with geolocation and dietary information, furthering efforts to identify unknown individuals from a forensic context. Here we test the methodological resolution of geolocation (δ18O, 87Sr/86Sr) and dietary (δ13C, δ15N) isotopes of one identified individual who immigrated to New York City from St. Vincent and the Grenadines (SVG), Lesser Antilles. Isotope-based geolocation estimates did not identify the childhood residency on SVG, but did point to New York City as a possible residence during early adulthood. The individual’s C3-based diet did not significantly change from childhood to early adulthood, illustrating the maintenance of food traditions after the immigration event. This study illustrates that further development of tissue-specific isoscapes incorporating bioavailable foods, drinking water, and cultural traditions is warranted to refine methodological resolution of isotopic applications in forensic anthropology.