What aspects of Diamond's evidence in Guns, Germs and Steel do lay readers have to take on faith because they are not explained?
In Guns, Germs, and Steel, Diamond does not generally ask his readers to take anything on faith. His book has an expansive bibliography, and readers can consult the works Diamond uses and lists there if they have any questions about his interpretations of them. In fact, Diamond's work, though original, is largely a synthesis, attempting to draw together many different strands of scholarship in many different subfields of history, anthropology, archaeology, biology. Diamond's work has received its share of criticism, but not for asking readers to take anything on faith. The major criticisms have suggested that his argument suffers from conceptual flaws or misinterpretations of evidence. Even lay readers are capable of tracking down different interpretations and arguments against Diamond's work, especially as it was reviewed in very high-profile journals and magazines.