It is obvious that Dr. C believes this, what is not so obvious is your contention that all “evolutionists” believe this.
How could Dr. C control for environmental factors when environmental differences (low class/ upper class) was the entire basis for the grouping in this study?
Yet another Brit blue blood who cannot STAND the fact that their greatest author (William Shakespeare) their greatest Scientist (Michael Faraday) and their greatest warrior (William the Marshal)were all commoners. He now seeks “Scientific” justification for his beliefs, but being a Psychologist, probably doesn't understand even the basics of conducting a Scientific study. Correlation is not causality. Biologically there is no such thing as a “Lower class”.
The end result of what he is saying is “Smart people make more money.” as well as “Educated people with access to wealth power and good schools raise children who end usually end up educated wealthy and powerful.”
Well obviously you think so, but he made some statements about what evolutionists believe and either don't say or just deny. You're denying it, which is what he said evolutionists did.
Don't freak-out, dude.