The documentary actually explained Diamond's theory more simply. It also explained that his initial research question was why there was such a discrepancy between the advantages or wealth of modern life by those of European descent versus the people in New Guinna who have lived the same way for 40,000 years.
The answer is not racist but it is tied in with the advantages of geography, which includes the advantages of weather and also natural food sources, the development of farming grains and domesticating animals, as well as the specter of disease, which killed more humans than soldiers with guns has.
So I say read the book or watch the video. Either way Jared Diamond is the original thinker (and researcher) they say he is.
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