The Legend of Korra is a complex study of evil

Decider

"For the countless things Avatar: The Last Airbender does right, there’s one place it flounders, and that’s when it comes to the complicated divide between good and evil," says Kayla Cobb. "It’s the Slytherin syndrome. In a world defined by divided factions, there’s one group that can always be counted on to be the bad guys, much like the green and silver-clad house in Harry Potter. Even though Uncle Iroh is a constant source of light and Prince Zuko has the all-time best redemption arc of the series, in Avatar the Fire Nation equals “bad.” That moral simplification is one of the errors The Legend of Korra remedies. Above all else Korra proves that evil — much like good — can exist anywhere."