Constitution Society Dedicated to research and public education on the principles of constitutional republican government. http://www.constitution.org/
Legal History and Philosophy Quotes from important persons, texts and documents, in the area of legal history and philosophy. http://www.commonlaw.com/
The Nature of Law Survey of theories on the conditions of legal validity including natural law theories and legal positivism, from the Stanford Encyclopedia of Philosophy. http://plato.stanford.edu/entries/lawphil-nature/