Europe became rich through brute military conquest/colonization of the Asia, Africa and South America. They capitalized on free labour, free flow of ideas and goods from their colonies.
to mentally subjugate them.
This is a daring proposal. What you are essentially saying is that we could simply walk into another country, tell the population: "Hey we are better than you, do as I tell you" ... and voila, we rule them.It really doesn't work this way. If you don't believe me, try your scheme on your neighbours. Report back.