In the mid-1950s, editorial director Irwin Donenfeld and publisher Liebowitz directed editor Julius Schwartz (whose roots lay in the science-fiction book market) to produce a one-shot Flash story in the try-out title "Showcase". Instead of reviving the old character, Schwartz had writers Robert Kanigher and John Broome, penciler Carmine Infantino, and inker Joe Kubert create an entirely new super-speedster, updating and modernizing the Flash's civilian identity, costume, and origin with a science-fiction bent. The Flash's reimagining in "Showcase" No. 4 (October 1956) proved sufficiently popular that it soon led to a similar revamping of the Green Lantern character, the introduction of the modern all-star team Justice League of America (JLA), and many more superheroes, heralding what historians and fans call the Silver Age of Comic Books.