> Besides her one caveat at the end of the article, the author seems to be making the case that this study implies that cultural factors are non-existent. I do

> Besides her one caveat at the end of the article, the author seems to be making the case that this study implies that cultural factors are non-existent. I don't think she's saying that at all. It's not one caveat at the end - the rest of the article is described as presenting a possibility, not an absolute truth. Hence she uses the words "hypothesize", "far from conclusive", "what if", etc. etc. Of course since she is arguing against the point of view that cultural factors are everything, she focuses on the other possibility. But she writes well and is very careful to not say that cultural factors are nothing - which is a correct position to take, because scientific research into this area, as she points out, is ongoing. We just don't know the answer to where things are along that continuum.