  This entry considers natural law theories only as theories of law. That is not to say that legal theory can be adequately identified and pursued independently of moral and political theory. Nor is it to deny that there are worthwhile natural law theories much more concerned with foundational issues in ethics and political theory than with law or legal theory. A sample of such wider and more foundational theories is the entry    Aquinas’ moral, political, and legal philosophy. In the present entry, “natural law theory” is to be taken as shorthand for natural law theories just insofar as they bear on law and are theories of or about it. This focus has the important incidental effect that many historically important differences between natural law theorists can be omitted, differences which pertain more to the foundations of normativity than to the nature and functions (“the concept”) of positive law.