The California initiative comes amidst a flurry of activity nationally in the past two months after nearly two-decades of inactivity, according to Bruce Mirken, director of communications for the Marijuana Policy Project in Washington D. C., which advocates legalization of marijuana. California has a legislative bill in the offing, he says, as does Washington State while New Hampshire has recently introduced a bill and Rhode Island has adopted a commission to study ideas.“There are signs all over the place that this has reached critical mass,” says Mirken, citing the photograph of Olympic superstar Michael Phelps last summer. He also says that law enforcement agencies have begun to realize the high cost of arresting, trying, and incarcerating marijuana users – money that could be better spent elsewhere. [Editor's note: The original version of this story mischaracterized the situation involving Mr. Phelps.]