The newest chapter (752) includes the start of the flashback about Law, Doffy and Corazon. Before the whole story is explained, I wanted to present you my new theory about Law and his Benefactor, Corazon. Spoiler: Law's hat As you can see, the size Law's hat fits a normal adult's head. But even during his childhood, Law already owned that hat, though it's too big for him. That reminded me of Luffy: Spoiler: Luffy's hat Luffy got his hat from Shanks (I hope I don't have to explain their relationship). Law stated that Doffy's brother, Corazon, would've been his benefactor, meaning that they had a similar connection. Shanks saved Luffy's life in sacreficing his arm, putting his hope into the new generation. I think that Corazon did something similar, but sacrefied his life (against Doffy) in order to save Law and gave him the hat as his last move. At the beginning of the flashback in this week's chapter, we saw Law ready to carry out suicid to kill Doffy and his subordinates, revenging Corazon's death, by several bombs he weared that time together with his/Corazon's hat. (Picture given above) But Doffy somehow managed to convince Law not to do that (probably controled him by his abilities), but to join his family.