Who can really say what effect parenting has on the development of a child? Presumably, the parents of Ted
and David Kaczynski didn't raise their sons in dramatically different ways, but these brothers ultimately live very different lives. It's sometimes difficult to define what a good parent is, and it may seem like it's easier to point out bad parents, but the distinctions may not be as clear-cut as everyone thinks. (Who is qualified to judge, anyway?) Here are just a few links on the topic of raising kids.
If you'd like to read more awesome and interesting stuff, check out this unrelated (but not entirely random!) Techdirt post