Like many parents and grandparents, I am worried about young people getting into trouble with marijuana and other drugs. The best solution, however, is honest and effective drug education. One survey after another indicates that teenagers have better access than most adults to marijuana—and often other drugs as well—and find it easier to buy marijuana than alcohol. Legalizing marijuana may make it easier for adults to buy marijuana, but it can hardly make it any more accessible to young people. I’d much rather invest in effective education than ineffective arrest and incarceration.

California’s Proposition 19, which would legalize the recreational use and small-scale cultivation of marijuana, wouldn’t solve all the problems connected with the drug. But it would represent a major step forward, and its deficiencies can be corrected on the basis of experience. Just as the process of repealing national alcohol prohibition began with individual states repealing their own prohibition laws, so individual states must now take the initiative with respect to repealing marijuana prohibition laws. And just as California provided national leadership in 1996 by becoming the first state to legalize the medical use of marijuana, so it has an opportunity once again to lead the nation.