Fun fact: the first president of Singapore was senior wrangler at Cambridge, which according to Wikipedia has been described as the "the greatest intellectual achievement attainable in Britain"[1].
Singapore also has one of the world's most liberal immigration policies, allowing practically anyone in who can get a reasonably paying job, instead of privileging the employment of its own citizens like most countries do.
1. https://en.wikipedia.org/wiki/Senior_Wrangler_(University_of...
Prussia was really the first example of this in the west, where in 1770 all civil servants were required to pass a written exam.
More seriously any society not ruled by a hereditary nobility is a meritocracy. The nobility did not embrace this change - they just lost the war with the middle class.
I should say that no society is a perfect meritocracy and that the past winners are always conspiring to keep out the new, but overall most current societies in the modern world are a vast improvement over the old, inbred-nobility ruled alternative.