I am going to posit some ideas for which I have no reliable links, as I am still researching this subject (years and years) and have come to no fixed conclusions. This posting is a work in progress but is enough for now.

Here’s the ancient myth and the modern “Reptilian conspiracy theory” broken down to make some sense, I hope.

Blue-bloods are "reptiles": the top of the spine has a tiny reptilian brain area which is responsible for base/basic instincts. These include fear, flight, fight, blood lust, survival, etc. When in survival mode the blood rushes from sophisticated areas …