A few more are listed at [1]. Of course, the data leaves plenty of room for interpretation, as none of these are truly controlled studies. But there is support

A few more are listed at [1]. Of course, the data leaves plenty of room for interpretation, as none of these are truly controlled studies. But there is support for environment mattering quite a bit, even if it isn't conclusive. https://en.wikipedia.org/wiki/Race_and_intelligence#Adoption_studies https://en.wikipedia.org/wiki/Race_and_intelligence#Adoption...