This was also the year were Satoshi stepped down for the reins and faded into obscurity, apparently handing over to Graven Anderson who was the lead technological expert
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Bold with this, Gavin Andresen. He was the lead developer for a while after Satoshi left the scene and then he quit for a while. Then he teamed up with Mike Hearn and they thought they had massive support from the community and they created Bitcoin XT.
This was an important event in Bitcoin's history, because it was the first attack from people that were one of our own.