In theory, it would make a lot of sense for Justice League members Batman and Green Arrow to get along well considering their similarities; however, this could not be further from the truth. While the two enjoy a mutual respect for one another, their differing methods and views of the world often lead to clashes. During Bob Harras and Tom Derenick's 2005 JLA storyline "World Without a Justice League," this tension was brought to the boiling point, and it all but destroyed any chance of the Justice League reforming in the aftermath of a devastating personal betrayal.

The story begins with the Justice League gathered to mourn and say goodbye to Manitou Raven, with each member partaking in a ritual to cleanse them of any wrongdoing and let go of the departed, each member but Batman that is. He stood off to the side while everyone else partook, since this was following the events of Identity Crisis Batman discovered that the Justice League had allowed Zatanna to alter his memories when they made a decision he disagreed with. Still, Batman's disengagement bothered Green Arrow a great deal, still feeling that the League and their actions were justified.

As a consequence of this revelation, Batman's distrust and paranoia were at an all-time high. He felt justified in his views now that countermeasures for groups like the Justice League were necessary. Too much power concentrated in so few individuals always leads to abuse in his eyes. As a result, he began the Brother Eye project.

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The League's decision during Identity Crisis shattered trust in one another and in their mission. This could not have happened at a worse time. The Key had recently come out of a drug induced coma with telepathic abilities he could not control. The only way to silence the constant voices in his head was to commit acts of mass murder. So while the League and Batman tried to separately track him down, both Batman and Green Arrow stewed on the choices they'd made up until that point.

To Green Arrow, everything the League did was justified. But to Batman, the strength of the League had made them arrogant. They have now started to abuse their power and make decisions that they should not be allowed to make. The mission was simple: stop the bad guy, bring them to jail, rinse and repeat. And yet somewhere along the way, as villains got increasingly worse and more consistent, the League's convictions began to fall away.

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Batman vs Green Arrow

Things finally came to a head when the Key forced all of Ollie's insecurities and frustrations to the surface, triggering a fight between him and Batman. Without any inhibitions, Green Arrow let loose every resentment he held towards Batman. The Dark Knight in turn succumbed to the Key's powers and expressed his anger at Green Arrow's inability to let go. Eventually,  Manitou Dawn helped them both regain their senses.

Their last time together as a team ended with Manitou Dawn making a split-second decision to banish the Key to the astral plane. There he would be alone for eternity, unable to hurt anyone, but also free of his constant pain. To Batman, this was just another example of the League abusing their powers taking matters into their own hands. He finally decided that he had seen enough and elected to leave the team. Green Arrow, on the other hand, still believed that the League had done what was best in each situation, and this disagreement led to the ultimate dissolution of that iteration of the team.

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