What political systems in Britain have been recognized by the world?

The earliest constitutional monarchy in the world is Britain. 1688, a glorious revolution broke out in Britain, and parliamentary sovereignty was established while retaining the monarch. The king began to be in the position of "unification without death" By the beginning of the 20th century, all the remaining monarchs in Europe (if not the Pope) were constitutional monarchs. Although the constitutional monarch is still the supreme leader of the country, their rights and obligations are more or less clearly stipulated by the Constitution. In this way, the power of the monarch is somewhat limited. Some monarchs are only representatives of the country, but they have no actual power. They are called "virtual heads of state"-Britain, Japan and Thailand are all such examples, but the monarch is still very loved and respected by the people.