>>14194336All of this, what you are saying, is linked to averages.
How productive a society is will be determined by the average "intelligence" or giftedness or whatever you want to call it of the average citizen. There will always be deadbeats and idiots of every society, what matters is the averages. Sub saharan africans are evidently worse off in almost every single regard compared to an east asian, european or even a mixed person. But even the mixed races are showing less general capacity than the previously mentioned on average, this is probably due to being mixed with sub saharan africans which are the weak link of humanity. But also because of the tribalistic factor I mentioned earlier, multiracialism just is not a good idea for a functioning society because of the constant internal conflicts it will bring (this we have countless of examples of throughout history, even because of rather small differences).
The average success due to these factors is what creates a society, there are sub saharans with somewhat high IQs, but they are not in an enviroment where they can develop - indeed, the problem is that the vast majority of them (because of averages) are not - therefore their entire race is not worth it since it will only drag us as a species down.