After Murray stirred up such a fuss with his publication of The Bell Curve, the APA (the main organization of psychologists in the US) put together a task force

After Murray stirred up such a fuss with his publication of The Bell Curve, the APA (the main organization of psychologists in the US) put together a task force to determine what mainstream, scientific, orthodox thoughts were about intelligence. The report is called "Intelligence: Knowns and Unknowns" and is probably your best bet for answering your question. The Wikipedia page on it highlights its findings. It's 20 years old at this point but I don't think too much has changed since then. https://en.m.wikipedia.org/wiki/Intelligence:_Knowns_and_Unknowns https://en.m.wikipedia.org/wiki/Intelligence:_Knowns_and_Unk...