The concept of Natural Law has rose in prominence alongside Voluntaryism and Abolitionism due to the rise of Slavery, Man-Made Law or Statism.

Usually known more specifically as "Natural Moral Law" and closely related to the concept of Natural Rights, Tao or recognizing a higher authority outside of man. Popularized in the 18th and 19th Century, the concept has been revived by modern thinkers, and has proved itself to be a great help for many individuals in their understanding and application of true freedom.