Brief Note: "Natural Law" is an older term referring to the Moral Law. It isn't a set of physical laws, that physical things cannot help but obey. It is a set of spiritual or moral laws that things who have a choice should obey.

Law: a reasonable order, promulgated by one who has charge of a community, for the sake of the common good. (St. Thomas Aquinas)

1. Principles of human action (Practical Principles)