This is where booze comes in.
This data come from the National Child Development Study (NCDS) here in the UK and clearly shows a link between brainy brats and their likely future consumption of grog. The link is also present in US studies.
What’s impressive about this research is that it takes into account not only income and education, but childhood social class and parents’ education as well.
This suggests that it is not because more intelligent people occupy higher-paying, more important jobs that require them to socialize that they drink more. It appears to be their intelligence itself, rather than correlates of intelligence, that inclines them to drink more.