This is a review essay of two books published in 2021 on the history of human heredity-genetics/genomics investigations—in the Middle East. Both books are structured comparatively. Both books grapple with the many uses of biology in nationalizing projects in the Middle East and the unavoidable tension between these particularizing projects and the scientific claim of biology to universality. Furthermore, both grapple with issues of classifications of humans and their uses in biology: the presumably biological human classifications of race, ethnos, and (...) ancestry, and the properly sociocultural ones, such as historical-traditional, by language, by religion. Combined, the two books offer a keen gaze on the complex entwinement of genetics and nationalism in the Middle East from WWI to the present. (shrink)

Bergmann’s rule and Allen’s rule played important roles in mid-twentieth century discussions of adaptation, variation, and geographical distribution. Although inherited from the nineteenth-century natural history tradition these rules gained significance during the consolidation of the modern synthesis as evolutionary theorists focused attention on populations as units of evolution. For systematists, the rules provided a compelling rationale for identifying geographical races or subspecies, a function that was also picked up by some physical anthropologists. More generally, the rules provided strong evidence for (...) adaptation by natural selection. Supporters of the rules tacitly, or often explicitly, assumed that the clines described by the rules reflected adaptations for thermoregulation. This assumption was challenged by the physiologists Laurence Irving and Per Scholander based on their arctic research conducted after World War II. Their critique spurred a controversy played out in a series of articles in Evolution, in Ernst Mayr’s Animal Species and Evolution, and in the writings of other prominent evolutionary biologists and physical anthropologists. Considering this episode highlights the complexity and ambiguity of important biological concepts such as adaptation, homeostasis, and self-regulation. It also demonstrates how different disciplinary orientations and styles of scientific research influenced evolutionary explanations, and the consequent difficulties of constructing a truly synthetic evolutionary biology in the decades immediately following World War II. (shrink)