[genman]

I wonder if some external factors are at play like influx of people from different societies. There is now more wider cap also in England as presented here https://www.theguardian.com/education/2025/mar/10/boys-widen...

Interestingly earlier study found non existent cap in more equal societies https://www.theguardian.com/education/2008/may/30/schools.uk...

I have similar criticism about the possible causation of the recent study. This research doesn't disprove innate reasons, it only shows that correlation is not dependent on age but exposure time.