to strategically send pieces of modern technology (a laptop, an artificial heart, et cetera) to specific places in the year 1941.
The JSA's Spectre looks into the JLA members' minds, and sees the worst parts of the future (e.g., the dismantling of New Deal programs, causing the poor to suffer greatly).
The League members escape their imprisonment and return to 2000, where Morrow's citadel is being attacked by descendants of the JSA; made corrupt by unearned power, the heirs of the Society intend to hijack M.O.R.R.O.W.
In 1941, most of the JSA members plan to use Morrow's technology to improve the world, but The Flash (Jay Garrick) tries to tell them that it's wrong to do so.
The JSA travels to the year 2000 and sees what has happened to the world as a result of Morrow's efforts and their own.