It turns out that many of the threats the Green Lanterns face to keep the DC Universe safe can all be traced back to one particular source. Hal Jordan's earliest days as a Green Lantern revealed a legacy of pain and torment that begins with the Green Lantern Corps' founders, the Guardians of the Universe.
As some of the oldest beings in the DCU, the Guardians have witnessed the growth of the universe over eons. Taking it upon themselves to achieve peace in a lawless world, they tried several notable attempts to establish order, but found their greatest success with the Green Lantern Corps. Having harnessed the Green Light of Will, the most stable light in the Emotional Spectrum, they were able to create an organization that has protected the universe for billions of years. Though they often face criticism over their leadership skills, it's no doubt the Corps has been a success.
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But that success has come at terrible cost that can be seen firsthand in the Green Lantern storyline «Secret Origin» by Geoff Johns and Ivan Reis. The future leader of the terrifying Red Lantern Corps, Atrocitus, is on the lose on Earth thanks to Hal Jordan’s predecessor, the Green Lantern Abin Sur, being misled by an ancient prophecy. It’s revealed that Atrocitus is actually one of the few survivors of a brutal massacre committed by the Manhunters, the Guardians’ former peacekeeping force. A programming glitch caused them to wipe out an entire sector, putting Atrocitus on a path of vengeance. Atrocitus fashions a device and seeks to steal a great power prophesized to be within William Hand. However, after Atrocitus is apprehended, Hand makes off with his invention, which
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