character. In an unprecedented move at the time, National Allied Publications introduced a second comic book, Superman, exclusively featuring the popular character. In the next few decades of publication, Superman underwent significant changes as a character, with new characters being introduced and changes in his history. Although the character was supposedly the same as ever, there were conflicting details of his origin by the early 1960s, including where he worked as a reporter and the fact that he was supposedly in two separate original teams of heroes, both as an honorary member of the Justice Society of America and as a full member of the Justice League of America, the latter of which included a number of heroes who had replaced the originals in the Justice Society. This conflict was resolved in an issue of The Flash #123, "Flash of Two Worlds". The story introduced the idea of the DC Multiverse, which presented the idea that these original heroes from the Golden Age were from Earth-2, while the current generation of heroes were from Earth-1. This created an infinite number of worlds on which any number of conflicting stories could occur. This resolved the many conflicts in Superman's history at the time. The Multiverse, however, allegedly turned out to be too complicated. DC Comics wanted more readers for their comics and decided that they would ease the confusion of new readers by getting rid of the Multiverse. They would accomplish this in the 1985 12-issue limited series Crisis on Infinite Earths. DC decided that, with the series, they could reboot the history of many of its characters, including Superman, leading to the idea of a last in-continuity story for the character. Production With the conclusion of Crisis on Infinite Earths, the fictional continuity of the Silver Age that had begun in the 1960s was closed. From October to December 1986, all of the regular Superman comic books were not published to allow for the publication of the limited series The Man of Steel, which would reboot Superman's continuity. Outgoing editor Julius Schwartz decided to "make believe" his last two issues of Superman and Action Comics were the actual last two issues ever. Initially, Schwartz wanted Superman co-creator Jerry Siegel to write the story as a way to book-end the character; however, Siegel was unable to do so due to legal restrictions. So while at a convention, Schwartz asked British writer