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The first strand of the book, which occupies less than one-tenth of Tierney's text but has received the most public attention, argues that Neel and Chagnon collected blood samples for the Atomic Energy Commission to compare mutation rates in populations contaminated by radiation with those in one uncontaminated by it and at the same time carried out an experiment on immunity formation among an isolated population involving a measles vaccination program. According to Tierney, although a safer and cheaper vaccine was already available, Neel chose the Edmonston B vaccine because it produced antibodies that would allow for comparison of European and Yanomami immune systems and prove the latter's ability to generate levels of antibiodies similar to those of populations previously exposed to the disease. Tierney's most controversial and damaging charge is that these activities may have led to a deadly outbreak of measles. While medical experts agree that no vaccine could have caused an epidemic, it is still not clear why this outdated vaccine was chosen or what measures were taken to care for those affected by its known reaction.

For Tierney, however, seemingly any biomedical research is unethical; all studies for Tierney are "experiments" (however observational their methods), and all "experiments" that do not directly benefit the community involved in the study are "criminal" (p. 43). Thus James Neel, a recently deceased distinguished human geneticist as well as physician, who carried out an extensive series of biomedical studies of the Yanomami, is criminalized.

ere is where Neel parted company with classical eugenics. He never advocated selective breeding practices. He merely pointed out the selective consequences of Yanomami polygyny (Neel 1980 ) and noted with irony the extreme unlikelihood that populations in the industrialized world would adopt Yanomami marriage practices. His prescriptions for the gene pool (Neel 1994 ) all involved manipulating the environment rather than genetics. These included efforts to control population growth, "euphenics" or the reshaping of environments to "ameliorate the expression of our varied genotypes" (Neel 1994 :353), keeping mutation rates as low as possible through control of exposure to environmental mutagens, and providing counseling to prospective parents to decrease the transmission of genetic diseases. None of these ideas bear any resemblance to classic eugenic schemes.

The most serious charge accuses Neel of deliberately initiating a 1968 measles epidemic among the Yanomami by using a hazardous and contraindicated vaccine to test theories about human evolution, “leadership genes,” and infectious diseases.

Various other allegations against Neel in Tierney’s book include the following:1.That he failed to provide medical care to the Yanomami during the measles epidemic.2.That the Yanomami population-genetics studies directed by Neel were performed as controls for comparison with work on mutation detection among the survivors of the atomic bombing in Japan.3.That Neel performed unethical experiments on the Yanomami, involving radioactive iodine injections.4.That he sought to demonstrate the existence of a “leadership gene” among the Yanomami headmen.5.That Neel was somehow involved in administering plutonium injections into patients in the Rochester hospital where he was a medical house officer in the 1940s.6.That he discounted the risks of atomic radiation.7.That Neel denounced modern American society and advocated improving the human race by principles of coercive eugenics.

Chagnon, aged 63, is one of the most distinguished anthropologists alive.

But he has also made plenty of enemies. Some are professional. Chagnon’s explanation of Yanomamö violence was deeply controversial, both. among people who understand it as a general theory of human nature (which it is meant to be), and among those who see it only as a particular explanation of Yanomamö culture. The Yanomamo are not, in fact, exceptionally violent by the standards of aboriginal people.

Chagnon’s enemies believe the Yanomamö sometimes fought because he had paid them to act for his cameras.

El Dorado Task Force

activities that may have resulted in personal gain to scientists, anthropologists and journalists while contributing harm to the Yanomami

activities by anthropologists, scientists and journalists that may have contributed to malnutrition, disease and disorganization

His accusations against Chagnon also implicate him in the epidemic, arguing that he administered a counter-indicated vaccine on Neel's instructions; but Tierney's major charges are different and various. He claims that Chagnon interfered massively with the lives of the Yanomami in all sorts of ways.

The charges that James Neel induced a measles epidemic among the Yanomami or at least treated them like guinea pigs to be studies while the epidemic ran its course have been disputed by medical experts and others who know about Neel’s research. If these charges are without merit, as now seems probable, then the only accusations remaining against Neel depend on innuendo and guilt by association. In the final chapter of his book Tierney retells the disgraceful story of how American doctors experimented on unwitting subjects in the USA whom they referred to in their files as "human products."