Denny O'Neil the likely actual story editor or editor as the story notes are signed as his and he takes over as the credited editor with the following issue.
Justice Society of America [Mister Terrific; Doctor Midnight; Johnny Thunder; Superman; Batman; Wonder Woman; Spectre; Sandman; Atom; Black Canary; Starman; Doctor Fate; Flash; Hawkman; Power Girl; Hour-Man; Star-Spangled Kid; Wildcat; Green Lantern; Robin]