In the world of DC, in contrast to Marvel, very few heroes are born - they're made. This has helped make the worlds of Marvel and DC even more stark, helping readers more easily decide which version of heroes they prefer. DC has played on a variety of tropes, from science to psychology, to explain why their greatest heroes decided to don a costume and protect the world.
Source：https://www.cbr.com/dc-comics-most-common-superhero-origins/
