I think alot of "evil" behaviour can be attributed to the environment they are subject to in their early years of life. If children see love, kindness and respect they are more likely to think this is the norm and follow it's lead whereas if a child sees hate and destruction then that then becomes normal and they are more likely to follow that path. Children (which become adults) are like little sponges and are very easily mislead and influenced which is why I believe society needs to protect it's children at all costs and try to provide a strong moral role model for them to follow as they take our place as the worlds adults and future decision makers.