Only a child believes he can end peace, like Kakooli said, Sasuke thought of his plan in one day. A horrible one I must add.
Neither Naruto nor Sasuke can achieve true peace. Even Kishimoto portrayed that in Chapter 700 with the Gokage meeting, but he is trying. No one can ever rid the world of darkness, and I'm sure Naruto didn't "spat" out nonsense about changing the world and making everyone sing and dance with rainbows everywhere. His dream was becoming Hokage first, and those nonsensical ideals where thrown at him by his Sensei, father, and etc,.
What you both fail to mention is what "good" Naruto has done for the world by itself. He was the first one to bring the Leaf and Sand together, and he was still a "Genin."