 It is common ground between these views and interpretivism that, like other contingencies, the practice of legal institutions may change rights and obligations because and to the extent that it is morally relevant. This implies that the rights and obligations so produced are ordinary, genuine moral rights and obligations. Moreover, it implies that legal institutions can exploit the fact that their action is generally morally relevant in order reliably and systematically to change what we owe to each other. While the views in discussion focus on these implications, interpretivism concentrates on the problem of identifying the content and operation of the principles that in fact make legal practice morally relevant and govern its effects on rights and obligations.