Tag: jennifer raff

  • Genomics

    Reading: Jennifer Raff, Origin: A Genetic History of the Americas (Twelve, Hachette Book Group: 2022)

    Raff deliberately and persistently foregrounds collaboration between archaeologists and American Indigenous communities throughout the book. There are obvious reasons for that emphasis, but I increasingly wondered what this book would look like if it included tensions and conflicts between the two groups. Not to worry! Raff has anticipated this readerly criticism, and the last chapter is all about scientific abuses of the DNA of Indigenous peoples and the results of that eroded trust. I did not actually know that Indigenous groups in the United States now routinely decline to participate in many modern genome mapping and databank projects, including commercial ancestry testing services. Makes sense!

    Research that has caused harm to Indigenous communities in the Americas (and elsewhere) has poisoned efforts to understand their histories using genetics. As of this writing, there are very few publicly available genomes from contemporary Indigenous North Americans, and even fewer from ancient North Americans that have been sequenced enough to confidently do detailed population comparisons. In comparison, there are thousands of genomes from contemporary Europeans and hundreds of genomes from ancient European populations. This bias is problematic because it excludes Indigenous peoples of the Americas from potential benefits of genomics research (such as genomic medicine, the use of genomics for repatriation claims, or capacity building within communities). [265]

  • The Genomes of Dogs

    Reading: Jennifer Raff, Origin: A Genetic History of the Americas (Twelve, Hachette Book Group: 2022)

    It is time once again to teach my undergrad survey on World History to 1500, which means it is time once again to think about revising my lectures and staying vaguely up-to-date with the scholarship. (The eternal, never-ending, Sisyphean labor of teaching slightly outside your own field of expertise.) To that end, I’m reading Jennifer Raff’s book on DNA and the earliest migrations of people into the Americas, which successfully threads the needle of “science writing for a non-specialist audience.” I enjoyed the surprise appearance of dogs in the narrative. (NB: “Beringian Standstill” refers to the apparently extended isolation of the peoples who settled along central Beringia when it was still above water.)

    In recent years, we have been able to get insights into human history from an unexpected source: the genomes of dogs… [Angela] Perri and her colleagues have suggested that the Beringian Standstill provided the ideal conditions needed for the domestication of dogs: an environment that favored close associations with humans for access to scarce food resources, isolation from other canid groups, and clear evidence of genetic adaptations for Arctic conditions in parallel with human adaptations. This intriguing hypothesis matches the timing for the emergence of domesticated dogs somewhere between 40,000 and 15,000 years ago (an admittedly wide range of time). [198, 200]