Drug reform
Problem: The world has waged a war on drugs for a century now. Drug prohibition has become a problem in and of itself - causing perhaps more harm than the drugs it is supposed to protect us from.
Solution: Ending the war on drugs.
Proposal: All drugs should be legalised, regulated, and taxed according to their harm. For highly addictive substances such as heroin and methamphetamine, a system similar to that of Switzerland should be implemented.