Masashi Kishimoto's Naruto began airing in 2002, ongoing all the way until 2017 with the conclusion of Naruto Shippuden. Over these fifteen years, many questions are answered regarding the motives or true identities of certain characters, like learning about Naruto's parents and Itachi's true intentions. Characters also grow and acquire new, powerful abilities that are often only unlocked after sacrificing something or making a painful choice.
Source：https://www.cbr.com/naruto-fan-theories-better-than-real-story/
