She finished her PhD (nearly 20 years ago) then worked as a web designer then a blogger, and now has published this book - there doesn't seem to be any evidence this is based on any kind of formalised, peer-reviewed academic research. She also has made sweeping, sensational claims that if true would reverberate across multiple fields - anthropology, archaeology, sociology, biology, etc. Which is a huge red flag for anything purported as some kind of academic theory, as invariably wildly sensational claims are inaccurate and don't account for the level of nuance and detail expected of such academic theories. Also given that she doesn't appear to be associated with any university even in a teaching capacity much less research capacity, referring to her as a "biologist" is perhaps somewhat misleading, as it suggests she is actively involved in contemporary research. Equally saying she "proves" this rather than "claims" (or if we are being charitable, "conjectures") it is also definitely misleading.
As general principle if someone, with an academic background or otherwise, suggests something which would completely reconfigure human understanding across half a dozen academic disciplines, it's probably based on a shaky understanding of most if not all of those and most likely both not generalisable outside of specific cases, and over-generalised in those specific cases it's based on. Anyone with a social media presence and a controversial enough opinion can say and get published as a book (rather than an academic monograph based on research published previously in peer-reviewed journals) anything they like (in fact increasingly having an active social media platform is becoming a prerequisite for being published outside of academic peer reviewed journals). The fact she is unable or unwilling to try and publish her arguments in a peer-reviewed journal speaks volumes I think.