Alternative versions of Superman establish a new continuity for DC, affecting not only Superman, but all of the DC Comics characters. The versions of Superman from this time period are traditionally divided into three main periods. The first version of Superman began being published by DC Comics in 1938 appearing in "Action Comics" #1. To explain discrepancies in the aging of Superman across several decades, his earliest stories were retroactively portrayed as having taken place on an alternative world called Earth-Two. These stories take place from 1938 until the late 1950s, although the exact dividing line is unclear and some stories happened identically to
Creator ownership in comics Walt Simonson, Jim Starlin, Len Wein, and Marv Wolfman. The effort failed to get off the ground. In addition, Adams, along with the Joker creator Jerry Robinson, notably and vocally helped lead the lobbying efforts that resulted in Superman creators Jerry Siegel and Joe Shuster receiving decades-overdue credit and some financial remuneration from Superman publisher DC Comics. Marvel Comics had a mixed history of responding to the issue of creator's rights. In 1978, Marvel and Howard the Duck writer Steve Gerber clashed over issues of creative control, and Gerber was abruptly removed from the series. This was the first highly