The world’s strongest nations in the 400 years from 1500 to early 1900s had been always in Europe.
European leaders were proud that "Europe is the center of the world!".
However, their pride was destroyed after World War Ⅱ.
After WWⅡ, the western half of Europe came under rule by the United States, the eastern half of Europe came under rule by Russia(Soviet).
Europe fell completely.
European leaders had despised the United States and Russia as "barbarous hicks" till that time.
Though, Europe became utterly unable to disobey them.
Proud European leaders must have felt a deep humiliation by it.
Their pride was deeply hurt.
But, Europe wasn't realistically able to beat to the United States and Soviet which are military superpowers.
So, they had reluctantly endured it for over 40 years.
Such European leaders sincerely welcomed “the collapse of the Soviet”.
“Eastern terrible white bear(Soviet) died”
It meant that the threat to Europe vanished from the world.
In other words, It meant that “Europe doesn't need protection by the United States anymore, doesn't need to succumb to the United States”.
And, European leaders were possessed by a grand ambition.
“Let's recapture hegemony to Europe again from the hick rednecks(USA)!”
Although, it is absolutely impossible “European one nation will become world's strongest alone”.
Then, How can Europe recapture hegemony?
Jacques Attali who was a counselor to French President said as follows.
“We should unify European currencies and European politics, and expand EU to Eastern Europe and Turkey. If it is realized, Europe in the 21st century will become a superpower that exceeds the United States.”
It is "Let's build the nation that exceeds the United States by unifying Europe!".
The reason why European countries accept emigrants is that Europe want to maintain working force to recapture hegemony.
