Board Thread:Antaeus' Arena: Audience Chamber/@comment-1515612-20180222213908/@comment-33328859-20180410132751

We never know what might have happened if Percy never existed. Luke would perhaps still function as an informer at Camp, without revealing his true colors. All the demigods and immortals helped at Olympus, but Percy's contribution was more than what a person needed to put in. The Great Prophecy does not mention the Titans; they could have risen anytime. If the Big Three had never broken their oath, the Titans could still come to power through Luke or the sarcophagus and either make the gods work as servants or chop them into pieces and discard their remains into Tartarus. The situation of the oath breaking would then be inevitable and a half-blood has to be born, thus fulfilling the prophecy. So no, Percy's birth wasn't responsible for the Titan's rise, on the contrary, it was responsible for their defeat. If it wasn't for Percy, Luke wouldn't have been able to give the knife to Annabeth (remember that Kronos was about to kill Annabeth, despite Luke's efforts to control him).

Based on this, I conclude Percy was responsible for the Titans' defeat. (But the more I think of it, the Fates were responsible by leaking a sinister prophecy, but whatever...)