[hide]I'm pretty sure it's because he loved all of the innocent people so much that he was willing to die for them. This in turn allowed Harry to die to get rid of the horcrux inside of him but still be able to return and finish Voldemort off.[/hide] I don't think that true. Dumbledore told him that it was Lily's blood that prevented Harry from dying. Thereofre, it was Lily's blood that prevented Harry from dying. Pretty simple. Rowling never followed up on what Dumbledore said...like "that may have made all the difference." Harry's willingness to sacrifice himself (aka love) really led to the protection of everyone against Hogwarts against Voldemort's spells, as Harry pointed out that they weren't binding anymore. Now, I may be way off here, but was there not something to the extent of if someone is murdered and they knew it would happen, but didn't attmept to stop it or defend themselves they might be able to return due to (anchient?) magic(k)?