Legal liquor helped put Al Capone and bootleggers out of business. Legal marijuana may help put drug cartels out of business. Marijuana is legal in a few states but they have been enough to inspire a change. A direct cause-and-effect relationship can’t be proven, but drug cartels are switching to other drugs, other illegal businesses, and are even smuggling particular US strains back into Mexico. The cartels’ diversification may help them survive; but, as they change, their influence may change as well.