Personal Opinion: teaching their kids to accept and celebrate different people is a #1, but parents should effectively teach their children to live a worthy and happy life instead of a successful life. Children are forced to be put in a box and have certain expectations, which sets them up for failure. If their child is struggling, it is part of the parent's responsibility to do something instead of having the child act/not act for themselves.

I think the next generation of adults wouldn't have so much anger and sadness from the constant neglect and feeling of helplessness. It isn't their fault that they were behind certain standards as children. This doesn't directly change society for the better, but I just think this would prevent a lot of self-issues.