[obtu]

IQ is one of those “look for the keys under the streetlight” things. It's for people who really care about intelligence being something measurable as a decimal number. In every study that isn't a meta-study like this one, the tasks that were measured are available and will tell more of the story.

Our minds are modular, studies measuring ability at precise tasks can improve our understanding of it. I wish people didn't try to make silly sweeping statements on nature vs nurture something that science has to care about.

The only justification for this paper is that it is debunking a book that was originally pseudoscience, but the whole discussion that followed that book is flawed for letting that book set the framing that intelligence boils down to one number.