Everything will be fine @janusface :)

The world will change a little bit, but if you look at the things happening when people are getting a better life standard, you will see that there is nothing to worry about.

Hey, and if the european are continuing their welfare there will be so few people in europe in some generation that it will be more than enough room for some africans. :)

No but seriously, I don't see the problem. Africa alone could sustain more than 100 times as many people as there is living there today. The real problem I guess is if these guys are doing a social democratic, imperialistic model like the US. Then we will have som big trouble in some 50 years or so.