The first questions that one should ask regarding things like this are:<p>- How does this compare to other countries?<p>- Do other countries make use of similar lines of evidence in similar ways?<p>- Have other countries made the same mistake of over-interpreting the evidence and subsequently overhauled it?<p>The World contains a convenient set of correlated pseudo-replicates of western societies. Discourse in the USA often fails to make use of them.