This article doesn't tell us what we think it does. In America, the relationship between drug use and high IQ is small or non-existent: http://www.psychologyto

This article doesn't tell us what we think it does. In America, the relationship between drug use and high IQ is small or non-existent: http://www.psychologytoday.com/blog/the-scientific-fundamentalist/201010/why-intelligent-people-use-more-drugs http://www.psychologytoday.com/blog/the-scientific-fundament... (Someone else linked this earlier) Despite the UK being very similar to the US, on a global scale, the relationship between IQ and drug use is not the same across the herring pond. There are relationships between IQ and social indicators that are consistent across time and nations, and this isn't one of those. Whatever is causing this relationship in Britain is cultural - I doubt it's a feature of high intelligence, rather than just Brits who have high IQ.