English law is the legal system of England and Wales, and is the basis of common law legal systems used in most Commonwealth countries and the United States (as opposed to civil law or pluralist systems in other countries, such as Scots law). It was exported to Commonwealth countries while the British Empire was established and maintained, and it forms the basis of the jurisprudence of most of those countries. English law prior to the American revolution is still part of the law of the United States, except in Louisiana, and provides the basis for many American legal traditions and policies, though it has no superseding jurisdiction.