Sorry, but speaking as an old fashioned traditionalist conservative - it's NOT all about parenting. Giles - do you really think that only liberal, uncaring or hands-off methods of raising children produce trouble and troublesome children? Because if you, you are labouring under some serious delusions.
This is not the 18th century. There are a hundred things going on, that children are exposed to from Day One, that can outweigh parents' best intentions and efforts. Start with exposure to chemicals in the womb that produce neurological damage. And then keep on going after that.
The idea that you appear to be promoting - that it's all in the childrearing - is an embarrassingly bad and hopeless liberal idea. God has other plans.