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. Constitution Society - Dedicated to research and public education on the principles of constitutional republican government. Legal History and Philosophy - Quotes from important persons, texts and documents, in the area of legal history and philosophy. Legal Information Institute - About...Jurisprudence - An overview of "jurisprudence," the philosophy of law, with additional resources on "critical legal studies" and "feminist jurisprudence." ThirdAmendment.com - A collection of articles on a variety of legal issues. The law of logic - Summary of the logical consequences of an agreement to communicate, and its impact on the law. Deborah Charles Publications - Abstracts of articles on legal theory. Longang Institute - Historic Reference Works - Significant historical legal writings.