Related to this; Check out the book The Revolutionary Phenotype. "The Revolutionary Phenotype is a science book that brings us four billion years into the past, when the first living molecules showed up on Planet Earth. Unlike what was previously thought, we learn that DNA-based life did not emerge from random events in a primordial soup. Indeed, the first molecules of DNA were fabricated by a previous life form. By describing the fascinating events referred to as Phenotypic Revolutions, this book provides a dire warning to humanity: if humans continue to play with their own genes, we will be the next life form to fall to our own creation. "I am VERY impressed with this book—very important topic very well treated." - Robert Trivers"

https://www.goodreads.com/en/book/show/43128410-the-revoluti...

The book defines the transition from RNA to DNA as a Phenotypic Revolution