I can think of a third thing beyond nature or nurture: culture.
Oh, don’t say it’s part of nurture. It’s a little different. If you say I’m making up my own categories, I will retort that your categories were wrong in the first place.
Nurture, as it is typically used, refers to how an individual is raised. But culture inheres in the group as a whole. Culture is a very sticky thing, and its influence can last millennia.
Last time I checked, black people had the shit kicked out of them in Africa. They were brought as slaves to North and South America. Meanwhile, Africa itself was colonized. There just isn’t a black culture in the world that is free of this legacy of violence, oppression, exploitation, and degradation. All of this is bound to have a deleterious influence on cultures that can be labeled “black.”
So there simply is no test tube for seeing how black people would be doing outside of this history. You can control for socioeconomic achievement, yet still this negative legacy and its influence on culture remains.
And while we’re judging the genes of black people, perhaps we should be judging those of white people as well. I’m white, and I’m not proud of how white people have acted. It’s white people that enslaved black people. It’s white people that committed genocide in North and South America and displaced the native populations. It’s white people that took Australia from the natives there. It’s white people that colonized Africa and exploited the people there. It’s white people that colonized India. It’s white people that oppressed China and caused the Opium Wars. It’s white people that produced despots like Napoleon, Hitler, and Stalin and gave the world such major conflicts as the French and Indian War, the Napoleonic Wars, and two World Wars that caused misery and destruction across the globe.
Do white people have a gene that causes them to be murderous, exploitative bastards? Perhaps we do. All in all, who has caused more destruction and misery in the world–white people or black people? The answer is obvious. My own race. White people. (Asians come in second with Genghis Khan, Mao, Pol Pot, and the Japanese participation in WWII. A distant second, but hey, they tried.)
So the “racial realists” can wring their hands about black violence, IQ, whatever, but, considering the historical context of white violence and oppression, isn’t it all a bit moot? Because the pointing finger is going to point right back at white people, and even more pointed questions about white genes will–or should–be asked.
Or we can all make a commitment to Love of Neighbor and move as a global culture toward that goal. I think that would be a more productive use of our time and energy as a species.