Canadian history teaches us not to take a politician's word as a commitment. Previous Liberal Prime Minister Jean Chretien promised to decriminalize marijuana in 2003 and failed to follow through. In August 1970, the Globe and Mail's front-page headline read "Marijuana to be Decriminalized" after Prime Minister Pierre Elliot Trudeau's Royal LeDain Commission recommended ending cannabis prohibition. Forty-two years and two million Canadian marijuana arrests later, we are still waiting for someone named Trudeau to make good on the promise. That shouldn't be hard to do. It's what the majority of Canadians want.