The Justice Society of America is the original DC Universe super-hero team, premiering during the Golden Age and fighting during World War II as part of the All-Star Squadron. Their founding members were the Atom, Doctor Fate, the Flash, Green Lantern, Hawkman, Hourman, Sandman and the Spectre. Their adventures have continued into the present day through legacy characters and an ongoing tradition of heroism held up through the eras. Don't be confused with the Justice League.
In the New 52 reboot, the Justice Society is revamped into a modernized version of the society known as Wonders of the World consisting of younger and more contemporary incarnations of the Societies' founding members.