The Class Struggle
Then came Communism, or if you like; Marxism. I will use the Soviet Union as an example, because what happened there is so evident to those who look at it. First of all they removed (killed…) or enslaved (forced into GULags or working class jobs) the elite of the Russian society (the smarter owners). Secondly they removed the barriers that had previously prevented intermarriage between the social classes. In the USSR the “owner” would marry the “slave” as often as not. They were encouraged to, directly or indirectly. “There are no social classes! We are all the same!”
The result (after only some generations) of this mixing of classes was a man not smart enough to perform the tasks of the owner, but still a man too smart to perform the tasks of the worker. This of course is code for “a criminal”…. one just smart enough to understand that he can break the rules and get away with it.
Now, not all ex-Soviet peoples are criminals, of course, but a disproportionately large amount of their populations are criminally corrupt. Russia is not “by chance” the most corrupt country in all of Europe, and competing for the title of the most corrupt in the entire world… Western Europe is not flooded by criminal East Europeans “by chance”. This is the result of the Communism they have been under for 70 or so years.
Smart people still exist there, they are just fewer. Really stupid people (average workers) still exist there – and their numbers might actually have been increased. But the amount of “socially mixed” individuals have been dramatically increased by Communism, and the average intelligence has been lowered. Thanks to Marxism.