It should be obvious that there is a skill component to maintaining a civilization. Importing people who have never developed, by themselves, past the level of fire and speech, a civilization that has been maintained over thousands of years is not only impossible, but also a recipe for disaster.
Not only is it wishful thinking it is also discrediting of those who built, died and protected that civilization from, sometimes, the same barbarians who are now trying to leech off of it.
As with the redistribution of wealth, where in the limit, everyone is poor, so is the case with civilization; without effort and suffering, everything is Africa. Civilization can not be imposed onto others, as they're not only, not equipped to maintain and develop it, they do not care for it as it is not their own.
To go even further I would also take a moment to criticize the modern Westerner, because in principle, he should be the one skilled enough for taking us to the next stage, contrary to this civilizational stagnation or decline we find ourselves in. Perhaps the next stage of civilization requires an even greater skill that he does not currently posses. That skill is not only in the physical world, it is also in the spirtual, in how we deal with the changing world and all of the different pitfals and traps in our civilizations and cultures.
Even if the global development lifts all of us together, the differences between the cultures on top and those on the bottom will be irreconcilable. Just as pioneers set out to cross the Atlantic, and left those less able for the journey behind, so too will the new forward-looking generations have to leave those who are not able to keep up.