User blog:D.Dragon123/Why did Dragon leave Luffy?

Okay Why did Dragon leave Luffy?

If the theory (Luffys mother theory.) Is true, then it could be to form the revolutionaries, and get his revenge against the gorosei:-) or maybe it was because that he didn't want luffy to grow up, in war and so on????

Anyways..........Share your ideas, what do you think, why did he leave luffy???