It may well be that the term "natural law" has outlived its usefulness and that it should be replaced by another expression, under whose label that which is sound and of continued value in natural law thought would have a better chance to assert itself. However, an appropriate alternative term for "natural law" does not seem to be readily available.
"On the Objective Foundation of Natural Law Norms,"
Syracuse Journal of International Law and Commerce:
1, Article 14.
Available at: http://surface.syr.edu/jilc/vol3/iss1/14