Riots bring out the worst in humans. The word itself is a response to the fear and ignorance by people who choose to repress something that is uncontrollable, and controversial in the human context. Unfortunately, most—if not all—riots result in bloodshed, disaster, and widespread chaos. While most view riots as wholly destructive, others would argue that riots are capable of bringing unprecedented change to a society desperate to escape an oppressive situation or a suffocating regime. And, oftentimes, riots are acts of senseless violence and unneccesary tragedy. From Los Angeles, Sao Paulo, and London, here are the most horrifying modern riots that have happened in the world in the past fifty years.