I’m not sure I agree with this statement.  Law is more than just the mechanism through which conflict is managed; it is broader than that.  Law is also a reflection of the values of the society, as well as the means through which order is maintained (both of which are necessarily broader than just managing conflict).

I’m not really sure, however, this statement can be evaluated in relation to family members.  The internal workings and relationships in a family don’t really lend themselves to a legal framework (unless, of course, those relationships have degenerated and there is no other option than resorting to the law).