The concept of "Rule of Law" is a fundamental principle in the legal systems of many countries. It refers to the idea that everyone is subject to the law, including government officials, and that laws are applied fairly and equally to all individuals. The "Rule of Law" ensures that there is a clear and predictable legal framework in which individuals and businesses can operate, and it helps to uphold principles such as individual rights, justice, and accountability.

While the "Rule of Law" is a feature of constitutional systems worldwide, option 1, Britain, is known for its historical contribution to the development of this concept. The British legal system has a long tradition of upholding the "Rule of Law" dating back to the Magna Carta in 1215, which established the principle that no one is above the law, including the king. Therefore, the correct answer is option 1, Britain.