And just a brief note to the parenthesis in the last post:
“Thus selection is an effect of who I choose to listen to (but I can’t really call that selection in any Darwinian sense) and, more accurately, of “what is transmitted”.
The “who” is, of course, a human organism, and whatever culture is composed of, it is not composed of human organisms. Thus, in the evolution of culture, selection cannot take place at the level of the organism. I suggest that, in terms of the evolution of culture, another human being, (as opposed to me) is an environment from which differentiable variation can be selected.