Reaction to Diamond

< summary >
    A species is the measure to living things based on whether they can interbreed or not. Also, a subspecies, that is, race is the measure to ones which changed a bit from original species. Yet, it is harder to classify humans into races than do other living things, because the criteria on appearance is not objective and also race tends to lead to hierarchy. According to Diamond, the traits classifying races vary because of natural selection or sexual selection, or sometimes they reflect mutations. Moreover, he shows several criteria of race, such as race by resistance, or digestion, or fingerprints, or by genes. Diamond himself doubts that the variations of appearance aim to enhance survival, and thinks sexual selection is the key. In conclusion, he insists that it is unnecessary to continue codifying the different appearances into arbitrary system of racial classification.

< reaction >
     The definitions of "species" and "subspecies" are meaningful. They are very convincing. However, I think the part of his own opinion is little. Also, many examples of the criteria of race do not seem to have an great effect. For example, the current content includes even the explanation about race by fingerprints, but I do not know well what Diamond tell readers by it. The construction of text should be changed to focus more on it.