Geneticists will always need to rely on non-genetic evidence to make any historical sense of the data—written texts, oral traditions, and interviews with people about who they are and where their ancestors come from. Without such evidence it is impossible to turn the testimony of DNA into a coherent account of the past, and that process means that there will also always be some degree of imagination involved in the construction of genetic history, just as is the case for historical accounts based on ancient texts or archaeological finds.This is a good reminder that scientific texts are not as objective as sometimes we would like to think.
For past posts on Professor Weitzman's research, including his recently published book, The Origin of the Jews: The Quest for Roots in a Rootless Age, see here and links.
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