If the family supports offending activity, making it seem legitimate and reasonable, then this becomes a major influence on the child's value system. However, the fact that offending behaviour often seems to 'run in families' could also be interpreted as supporting biological explanations, such as genetics. The solution may be that some offences (e.g. drug offences) are related to nurture whereas others (e.g violent offences) are more due to 'nature.