It's amazing to me that's it's a disputed point whether or not brain size might predict intelligence in humans. In practically every aspect of life where smarts are an advantage the guys on the top tend to have colossal foreheads. https://twitter.com/crimkadid/status/1266603652317356032

A million conversations have taken place, sometimes by enormously intelligent men, about how about Northwest Europeans might be different from everyone else in a way that allowed them to conquer the world. Why....what could it be!?

Scandinavians have the largest foreheads in the world and the half Danish Arthur Jensen could have been saved much mental anguish if someone had told him how the answer to so many of his open problems stared at him in his bathroom mirror every morning. @KirkegaardEmil