I'd like to make a few comments about the marijuana articles from April 14.
* John Kennedy makes a fair complaint about impaired driving, but I ask him to provide actual evidence that legalization increases traffic accidents. Google, "Medical marijuana laws, traffic fatalities, and alcohol consumption" and you will find a report by economist Mark Anderson, which looks at the effect marijuana legalization has had on traffic fatalities. This study found that states which have legalized have seen an 8 percent to 11 percent decrease in traffic fatalities.
* Regarding Robert Hertz's guest view: There is much research to support marijuana being a gateway drug, but no causal connection has ever been determined. It could be that the personality type of the person who uses marijuana is more predisposed to using drugs in general (so even if marijuana were not available he would find his way to drugs regardless), or that interaction with the illegal drug market influences people to move on to harder drugs (such that if marijuana were legal they would socialize less with those who would introduce them to harder drugs). Even if marijuana directly causes someone to move onto harder drugs, so what? Hertz must still show that peer-reviewed evidence finds that criminalization actually reduces the number of users and has a net-positive impact on society, which he didn't do. Furthermore, alcohol and tobacco are also gateway drugs and have a much more negative impact on society than all illegal drugs combined.
* Hertz is also concerned about the impact legalization has on teens. Research has failed to find that legalization increases teen marijuana usage rates.