The driving force for the legalization of marijuana in America – a frenetic, whip-smart son of a rabbi who can barely tell indica from sativa – has just entered enemy territory. Ethan Nadelmann, the executive director of the Drug Policy Alliance, is here in California's crucible of conservatism, Orange County, to talk about the failure of the War on Drugs and why the government should leave pot smokers alone. As a grizzled ex-DEA agent glares at him from the audience of a lecture hall on the campus of U.C. Irvine, it's clear that this crowd has not gathered to celebrate cannabis culture. And that's just the way Nadelmann likes it.