We should, of course, expect that laws will be backed by the threat of sanctions and that force may be needed. One of reasons, after all, for wanting to have a legal system is to ensure compliance on the part of those otherwise inclined or temped to behave in the ways required by social order. But recourse to sanction and force, it must be stressed, does not mean that laws cannot provide reasons or motivate without such sanction or that they must presuppose them. The laws claims authority, and that claim may often be valid. Unless one assumes that norms per se cannot be reason, then there should be no reason to insist that legal rules must necessarily be backed up with sanction. But given human nature we should expect them to be an important part of virtually all legal and political orders.