Ever wonder where the parents of the school bully went wrong?
Ingrain Empathy to Prevent Bullying
Bullies are sadly lacking in empathy; this is obvious to the layman, to other children, even. Parents can't teach empathy by lecturing about it. They must BE empathetic towards their children, and they must put their kids in circumstances that cultivate and grow empathy within them (such as having their kids do volunteer work with those less fortunate).
Forcing your kids to share their toys won't cultivate empathy. In fact, when parents get angry about the sharing issue and force it upon their kids, this is a form of bullying on the part of the parent. Bullying behavior can be learned from parents. But so can empathy. It's difficult for bullying and empathy to co-exist in the same child's body.