It might just be that I have to do more research, but my impression from the research that I've encountered (especially the twin studies) is that G (general intelligence, which IQ is designed to be strongly correlated with) is strongly correlated with genetics, and even influenced by genetics to a greater degree than by the environment; the Wikipedia (but Wikipedia in general as well) article[0] appears highly politically motivated to me. It at least greatly conflicts with the contents of this interview.
One argument on this subject that I feel is persuasive is this: "Why have African societies been much less developed technologically and intellectually (e.g. in writing, language) than Western societies for over 3000 years? Can you blame 3000 years on oppression? Furthermore, if you say the cause was oppression, why did those races let themselves be oppressed if they were equally capable?"
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The video description for your pleasure:
There is almost nothing more important to understand about people than intelligence. It can be measured more accurately than anything else in the social sciences. It differs tremendously and importantly between individuals. It is the single most important determinant of life success. It's very existence, however, remains subject to substantive debate, most of it highly politicized.
Dr. Richard Haier[1,2] has recently written a major book on the topic, The Neuroscience of Intelligence[3], summarized in the following manner: "This book introduces new and provocative neuroscience research that advances our understanding of intelligence and the brain. Compelling evidence shows that genetics plays a more important role than environment as intelligence develops from childhood, and that intelligence test scores correspond strongly to specific features of the brain assessed with neuroimaging. In understandable language, Richard J. Haier explains cutting-edge techniques based on genetics, DNA, and imaging of brain connectivity and function. He dispels common misconceptions, such as the belief that IQ tests are biased or meaningless, and debunks simple interventions alleged to increase intelligence. "
[0]: https://en.wikipedia.org/wiki/Race_and_intelligence [1]: Dr. Richard Haier's personal website: http://www.richardhaier.com/ [2]: his Wikipedia page: https://en.wikipedia.org/wiki/Richard_J._Haier [3]: his book, The Neuroscience of Intelligence: http://amzn.to/2em55A9
