I'm pretty certain you're correct. It seems to me that we won't get to the bottom of this until the study of intergenerational and cultural change becomes a muc

I'm pretty certain you're correct. It seems to me that we won't get to the bottom of this until the study of intergenerational and cultural change becomes a much more established science. And for that to happen we need much more research into the matter. Moreover, the objectives of any such research should be clearly defined and then rigorously carried out. This subject is a political football and the individual views and biases of researchers often taint the data. We won't make significant progress until we find ways of minimizing this problem.