Wikipedia sais about the Native Americans in the United States:
The lack of hard evidence or written records has made estimating the number of Native Americans living in what is today the United States of America before the arrival of the European explorers and settlers the subject of much debate. A low estimate arriving at around 1 million was first posited by anthropologist James Mooney in the 1890s, computing population density of each culture area based on its carrying capacity.
In 1965, American anthropologist Henry Dobyns published studies estimating the original population at 10 to 12 million. By 1983, however, he increased his estimates to 18 million.[35] He took into account the mortality rates caused by infectious diseases of European explorers and settlers, against which Native Americans had no natural immunity. Dobyns combined the known mortality rates of these diseases among native people with reliable population records of the 19th century, to calculate the probable size of the original populations.[3][4]
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The fait of the languages and culture of the native Americans is similar to that of Iberian and Gaulish language and culture - is it reasonable to presume that the native populations living in what is today Spain and France before the arrival of the Roman conquerors and settlers were in the same situation and have had the same fait like the Cherokee and Apache? This would explain the fact that neither Iberian nor Gaulish have left any traces except perhaps in toponyms.....
The lack of hard evidence or written records has made estimating the number of Native Americans living in what is today the United States of America before the arrival of the European explorers and settlers the subject of much debate. A low estimate arriving at around 1 million was first posited by anthropologist James Mooney in the 1890s, computing population density of each culture area based on its carrying capacity.
In 1965, American anthropologist Henry Dobyns published studies estimating the original population at 10 to 12 million. By 1983, however, he increased his estimates to 18 million.[35] He took into account the mortality rates caused by infectious diseases of European explorers and settlers, against which Native Americans had no natural immunity. Dobyns combined the known mortality rates of these diseases among native people with reliable population records of the 19th century, to calculate the probable size of the original populations.[3][4]
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The fait of the languages and culture of the native Americans is similar to that of Iberian and Gaulish language and culture - is it reasonable to presume that the native populations living in what is today Spain and France before the arrival of the Roman conquerors and settlers were in the same situation and have had the same fait like the Cherokee and Apache? This would explain the fact that neither Iberian nor Gaulish have left any traces except perhaps in toponyms.....