At one point of time UK was ruling entire earth, why it is no longer the best economy?

Indeed around 1870, Britain was ruling the world. The country was contributing 21 percent of the global output. However, a lot of events took place in the course that took that throne away from this once glorious land. World War two hit the country hard economically. Also, unlike the leaders UK had back in the days, it lacked that kind of cult personality in the following years that can captivate people’s imagination and lead the nation on the global scene dynamically. Also, eventually the world did away from all the expansion policies, for which Britain was once famous for. So its economy was strictly limited to its domestic boundaries, except for trade will allies. At the same time, the emergence of USA as the global leader following 1950s also took away the credibility of Britain. In the modern world, UK started playing less and less impactful role. This eventually limited its global stature to what we see right now. Of course, with great power, rich history and advancement in every department, UK still holds a very important place on the world’s map. But it is way past its glorious days, considered no more the best economy. In order for it to get back to the top, not only it has to work very hard—the other countries have to work way less. And this isn’t happening anytime soon