What is the main conflict in Everything Is Illuminated: A Novel by Jonathan Safran Foer?

Everything is Illuminated is a novel by Jonathan Safran Foer. The novel tells how Jonathan traveled to the Ukraine in order to find the woman whose family helped save his grandfather during the war. Jonathan does not find this woman, but he learns more about his own history and a war that up to this point was nothing more than an abstract notion. Jonathan also meets Alex, who learns more about his own family history than he ever expected to.