The Secret Society of Super Villains is a team fictional supervillains appearing in American comic books published by DC Comics. Over the years they have featured a large number of ne'er-do-wells as they attempt to subvert the superheroic population of the world for a variety of schemes.
These members of the Secret Society of Super Villains were secretly gathered by Darkseid when the group was first founded in 1976 through their splintering after the discovery of their benefactor's true identity. Since then, various leaders like Lex Luthor, the Wizard and the Silver Ghost have taken over or re-formed the Society, including old and new members in the roster.
In JLA #119 (2005) it was revealed that Catwoman was an early member of the SSOSV briefly as well (Catwoman was mentioned in the text of Secret Society of Super Villains #1 as being a member, though the penciller omitted her from the issue; this brief mention is the only known connection of Catwoman to the SSOSV prior to the present). Also, it was revealed that Despero brought the memories of the members back, and was responsible of the subsequent attack of the Society.
The next incarnation of the Secret Society was organized by the Ultra-Humanite, who organized foes of both the Justice League of America and the Justice Society of America.
When the JLA resurfaced with the Big Seven members, Brainwave started to gather a new Secret Society to take down the newly formed Justice League (JLA 80-Page Giant #1), but Brainwave was actually Martian Manhunter in disguise—the formation of this Society was a trap made by the League to defeat more supervillains in the same time. (As the tale was told by the Rainbow Raider to Sonar II, it is uncertain whether this tale actually happened. At the very least, there may have been some embellishment.)
Members gathered by "Brainwave" were: