Abstract: This presentation provides an historical assessment of how prominent members of the radiation geneticist community from the United States during the 1940s and 1950s successfully worked to establish the acceptance of the linear dose response model in risk assessment, transforming environmental, occupational and medical exposure standards and practices to the present time. It provides detailed documentation that the actions undertaking this policy revolution were ideologically driven, deliberately misleading/deceptive and included misrepresentations of the scientific record. Key activities are described and the role of specific organizations (i.e., Rockefeller Foundation and the National Academy of Sciences), and specific individuals documented. These actions culminated in the U.S. National Academy of Sciences Biological Effects of Atomic Radiation (US NAS BEAR), Genetics Panel report of 1956 which recommended the adoption of the linear dose response for risk assessment, a recommendation that was rapidly and widely adopted. It will be argued that current international cancer risk assessment policies were based on fraudulent actions of the US NAS BEAR I Committee, Genetics Panel and their uncritical acceptance by regulatory agencies and the scientific community.
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