Argument: Drug prohibition does not correlate with decreased use
"How to stop the drug wars." The Economist. Mar 5th 2009: "fear [of legalisation] is based in large part on the presumption that more people would take drugs under a legal regime. That presumption may be wrong. There is no correlation between the harshness of drug laws and the incidence of drug-taking: citizens living under tough regimes (notably America but also Britain) take more drugs, not fewer. Embarrassed drug warriors blame this on alleged cultural differences, but even in fairly similar countries tough rules make little difference to the number of addicts: harsh Sweden and more liberal Norway have precisely the same addiction rates."