For as long as stories have been told, written, and performed heroes have been the measures of a culture. A people’s values, their fears, their hopes, their customs have all been preserved in the stories of their heroes, and in recent decades, I would argue, in the stories of their superheroes. Tracing modern depictions of cinematic superheroes back to some of the earliest extant narratives of heroes in Homer’s Iliad and Odyssey, we see that most of our heroes in the past three millennia have been men. And in the modern explosion of superhero movies’ success and popularity, we see that many of these heroes have been cisgender, heterosexual, white men, at that. So what do these heroes’ masculinities have to do with the way they perform their...