History is littered with tragic and evil figures who have the left the world a sadder and/or more evil place than it was before their lives. We all have some kind of talent, ability, etc. to offer the world and it's our choice how to utilize it in our lives. Will our legacy be helpful or will it be harmful? May be interesting to think of evil or harmful historical figures and think what they could've offered had they "used their powers for good." Even take someone as horrific as Hitler. His ability to gain followers -- even whole populations -- could've been valuable if he had encouraged them to a good end (say, battling fascists, Marxists and/or other terrible philosophies). Just a thought.