I have my own take on that:

"Shortly after the end of World War II, elements of the American right began a project to breed the perfect conservative. This heightened when the Heritage Foundation began a Jurassic Park-style genetics program upon its founding in 1973 — the time-frame similarity with the invention of gene splicing is not coincidental.

The problem was then (as it is now) that their philosophy is inimical to thinking and feeling human life, but they were able to resolve this with the addition of reptile DNA. Injecting samples of this genetic material into existing Homo sapiens created the mutations that gave rise to the modern Republican Party..."

https://medium.com/politically-speaking/the-republican-party-is-full-of-it-b1be852e9755