
Originally Posted by
Desaad
A couple of things...
The Greens were largely isolationist, so much so that they rejected and resented the authority of a Green lantern sent to them. As per Ostrander's MM series. They colonized the entire solar system at one point, but then pulled back.
The White martians DID come to earth, experimented on and enslaved early humanity, and it was this experimentation that prevented humanity from developing to their full potential as the new cradle of the gods, retarding their growth. The Green Martians punished them for this, their great shame. This was all revealed in Morrison's first arc on JLA.
Originally J'onn couldn't fly interstellar distances. Ultimately it was revealed Erdel transported him not just through space but through time; Martian Civilization was long dead now. And even as he was being teleported away, his entire planet was dying of a plague created by J'onn's brother Malefic; he was a Martian who worshipped Darkseid and the New gods of Apokolips and did all sorts of horrible things to the native Martian populace. For his madness, his telepathy was removed, which drove him even further insane, but also cured him of the psychological weakness to fire. As a revenge plot he created the Burning Plague, which killed all the martians on the planet. J'onn was snatched just as everyone around him was dying, IIRC. All in Ostrander's MM series.
As mentioned above, Joe Kelly's "Trial By Fire" makes it clear that the Whites and the Reds had one common, extremely aggressive and destructive ancestor called the Burning Martian, who wasn't afraid, but instead WAS fire, worshipped fire, and needed fire to reproduce asexually. Seeing that they could be too dangerous a force in the universe they took them, dissected them, weakened them and inserted a weakness to fire into their genetic memory to curb their influence.
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