Superman’s first appearance in Action Comics #1 (1938) proclaimed that the character would “reshape the destiny of the world.” The advent of the first superhero initiated a shared narrative—the DC superhero universe—that has been evolving in depth and complexity for more than 80 years. Superman, Batman, and Wonder Woman have become key threads in the tapestry of the American mythos, shaping the way we think about life, right and wrong, and our relationship with our own universe. Their narr...