Prohibition doesn't help. The third major reason that marijuana should be legal is because prohibition does not help the country in any way, and causes a lot of problems. There is no good evidence that prohibition decreases drug use, and there are several theories that suggest prohibition might actually increase drug use (i.e. the "forbidden fruit" effect, and easier accessibility for youth). One unintended effect of marijuana prohibition is that marijuana is very popular in American high schools. Why? Because it is available. You don't have to be 21 to buy marijuana -- marijuana dealers usually don't care how old you are as long as you have money. It is actually easier for many high school students to obtain marijuana than it is for them to obtain alcohol, because alcohol is legal and therefore regulated to keep it away from kids. If our goal is to reduce drug consumption, then we should focus on open and honest programs to educate youth, regulation to keep drugs away from kids, and treatment programs for people with drug problems. But the current prohibition scheme does not allow such reasonable approaches to marijuana; instead we are stuck with 'DARE' police officers spreading lies about drugs in schools, and policies that result in jail time rather than treatment for people with drug problems. We tried prohibition with alcohol, and that failed miserably. We should be able to learn our lesson and stop repeating the same mistake.
