Darkness in El Dorado: human genetics on trial
Related Experiment Video
Updated: Oct 2, 2026

Manipulation of Gene Function in Mexican Cavefish
Published on: April 22, 2019
1Human Genetics Research Division, University of Southampton, Southampton SO16 6YD, UK. nem@soton.ac.uk
Abstract:
A recent book by a freelance journalist makes major accusations against genetic studies by J. V. Neel in the Amazon a generation ago. Contrary to these charges, there was no connection of Neel's work with human experiments conducted by the Rochester Manhattan project twenty years earlier, nor did the studies serve as a control for survivors of the atomic bombs in Japan. Neel was not a eugenicist. His program of measles vaccination reduced mortality, and was not in any sense an experiment. Given the passage of time and lack of supporting evidence, further investigation of these charges is pointless. However, the political climate in which human populations are studied has changed dramatically over the last generation. Unless guidelines reflect an international consensus, the benefits of population studies to human welfare and science will be jeopardized. The World Health Organization guidelines should be extended to cover current research.
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