Class is entirely intangible, and the way it affects things isn't subject to scientific analysis, and it's not supposed to be real but it's pervasive and powerful. See; just like magic.
Jo WaltonAvan was as religious as the next young dragon with his way to make in the world-which is to say that he held many traditional beliefs which he had never paused to examine, attended church because it would have seemed strange not to, rarely paid much attention when he was there, and found piety out of the pulpit thoroughly misplaced.
Jo Walton