“The agenda of biological anthropology became more scientific from the middle of the twentieth century.” Justify. (Answer in 250 words)

- “The agenda of biological anthropology became more scientific from the middle of the twentieth century.” Justify. (Answer in 250 words)
Introduction
The claim is defensible. Around 1950 physical anthropology exchanged a descriptive, classificatory programme for an explanatory one; Sherwood Washburn's new physical anthropology of 1951 marks the change.

Body
1. The earlier agenda: measurement in the service of racial typology — Retzius's cephalic index, Blumenbach's varieties, the racial classifications of Hooton and Coon. Types were treated as fixed essences and variation as deviation, so the work produced atlases rather than testable propositions, and served colonial and eugenic administration.
2. New questions: the unit of study became the breeding population, not the type. Following the modern synthesis of Dobzhansky and Mayr, the field asked how gene frequencies change under selection, drift, migration and mutation. Livingstone's 1958 account of sickle-cell and malaria in West Africa explained a frequency instead of naming a race, and his 1962 statement that there are no races, only clines, followed from the same logic.
3. New methods: population genetics and Hardy-Weinberg equilibrium, blood-group frequencies, multivariate statistics and explicit hypothesis testing. Radiometric dating fixed the fossil record, potassium-argon placing Bed I at Olduvai near 1.75 million years. Sarich and Wilson's molecular clock of 1967 dated the human-ape split to about five million years against palaeontological opinion, and was vindicated. Primate field studies by Washburn, DeVore and Goodall supplied behavioural comparison, and the International Biological Programme's Human Adaptability projects, including Baker's work at high altitude, measured adaptation directly.
4. The output changed: description gave way to falsifiable models, and the discipline now runs on ancient DNA and genomics.

Conclusion
The shift was one of logic rather than of instruments: explanation by evolutionary process replaced classification by type. The renaming of the American Journal of Physical Anthropology as biological in 2022 records how completely the older agenda was abandoned.