In medieval England, the Norman conquest the law varied shire-to-shire, based on disparate tribal customs. The concept of a “common law” developed during the reign of Henry II during the late 12th century, when Henry appointed judges that had authority to create an institutionalised and unified system of law “common” to the country. The next major step in the evolution of the common law came when King John was forced by his barons to sign a document limiting his authority to pass laws.

• The main institutions of law in industrialised countries are independent courts, representative parliaments, an accountable executive, the