Also, many superheroes have tragic backstories that play into why they're superheroes in the first place. Batman, for example, saw both of his parents murdered in front of him and dedicated himself to fighting crime to prevent things like that happening to other people. Another example of this is Spider-Man who let a thief go that he could've easily stopped; that same thief later broke into his home and killed Spider-Man's uncle. After this, Spider-Man realized that he had to be responsible with his power and use it to help others.