Marijuana will be legal in Canada one day. It may not be for eons – or  at least until the federal Liberals or New Democrats gain power, which  could be longer than eons. But it’s inevitable. Although polls suggest Canadians support the idea of legalizing  marijuana in general, they’ll want to see a detailed plan before backing  the idea unreservedly. That’s where the work needs to be done now by  drug reform proponents.