10 Supervillains Who Thought They Were The Hero
3. Sinestro
The Green Lantern Corps are a group of intergalactic officers who patrol the universe using rings fuelled by willpower. When Hal Jordan of Earth was chosen to join the Corps, he was mentored by the greatest Green Lantern, Sinestro.
Sinestro was revered by his comrades because he brought peace to his homeworld, Korugar. When Jordan visited Korugar, he learned the reason why the planet had abolished crime was because it was turned into a totalitarian dictatorship.
When Jordan learned this, Sinestro was banished from the Corps. Out of revenge, he created his own Corps to spread fear across the universe to prove it was a more effective tool to bring peace than willpower. When the Green Lanterns tried to stop him, he slaughtered thousands of them.
Sinestro has explained that he became a dictator out of necessity since terrorist bombings were rampant on Korugar before he declared martial law He has pointed out to Jordan that he is the only Lantern to bring about peace to a planet through fear, proving his method is superior. Because Sinestro succeeded where all Lanterns have failed, it's impossible for Sinestro to see how evil his actions are.