I personally think we need to value the idea of that body of knowledge, as a culture. Then, we can start to compare and contrast styles, etc.

The whole tiger mom/dad routine is so horrible for children. The lack of autonomy can have dire consequences later in life, and I think we're just starting to see that.

I know my tendency is to treat this like a problem, which needs data and analysis, refinement and tuning. But, if we were 10 generations into that process, I feel we'd have something to show for it. As is, every generation starts from zero (I think most people generally wing it).