In the case of Europe, due to the uniqueness of its geographical morphology and the diversity of European historical evolution, the countries on the entire European continent have small and numerous characteristics. The ideology of openness and integration has also made the leaders of many European countries young. For example, this one:

Born in August 1986, Kurz was elected Austrian leader in May 2017
After Kurtz's election, the Austrian People's Party rose 10 percentage points in the polls and led the way. Kurtz is energetic, and the music-loving Austrian people hope that in addition to the young face, he can also bring new ideas and breath to Austria.
Obviously, you can eat by the face, but you have to break through the world in the political arena.
Another example is this one:
Macron, who was elected president of France in 2017, was 39 years old and the youngest president in French history
His election broke the record for the youngest President of France held by Napoleon Bonaparte, who came to power in 1848, who was only 40 years old when he came to power.
And this little sister:
Vanessa de Ambrosio, 29, was elected chief consul of San Marino
San Marino is the third smallest country in Europe, the first from the bottom is the Vatican, San Marino is a little bigger than the Vatican, then its country covers an area of more than sixty square kilometers, compared to China, which ranks third in the world in terms of territorial area, at most it is a small town in China, and the population is only 33,000 people.
How many people can do forty without confusion?
Young leaders
For a country, the leader must have a strong management skill, a meticulous governing idea, and rich political experience to lead the country to move forward and develop benignly. But some don't seem to be the only standards in many European countries. Perhaps, for many European countries, youth itself is the greatest political capital!