Question: Which of the founders of the of the Creation Research Society and the Institute for Creation Research, also co-authored a book, that according to Ronald Numbers, elevated young earth creationism "to a position of fundamentalist orthodoxy." ?
Sentence (from "Old Earth creationism"): Old Earth creationism is an umbrella term for a number of types of creationism, including gap creationism, progressive creationism, and evolutionary creationism.
Relevant evidence: No