I am going to make some time to read at least a few of the suggested titles on this list about HBD: Human BioDiversity. The issues are or have been controversial and the material should be educational. Filtering fact from fiction is necessary to come to logical conclusions about the BIG stuff like IQ, gender differences, nature vs nurture, etc.
Stroll through the website for a lot of fascinating and captivating pages. You will want to bookmark this site.
A Fastidious Connoisseur of Empiricism
Here are a few maps from the site's American Nations Series: