Science shows that superheroes really do inspire greatness. A 2016 study led by Rachel White of Hamilton College and Stephanie Carlson of the University of Michigan, titled “The Batman Effect,” shows the power of superheroes to inspire kids. In the study, young children demonstrated increased perseverance skills when asked to imagine themselves as a favorite character.

But as you grow up and move past the comic book superhero stage, who do you consider a hero?