It’s kind of odd that the article doesn’t look at the social aspects. Different social groups have different patterns in and attitudes towards drug consumption.

It’s kind of odd that the article doesn’t look at the social aspects. Different social groups have different patterns in and attitudes towards drug consumption. These patterns change over time. Note, research is based on findings from 1970. In 1970, drugs might still be tied to counterculture, and thus to people with on avarage higher education (and on avarage higher iq), while in 2011 drug use seems to appear in much more diverse layers of society…