The Guardians of the Universe
The Guardians of the Universe are one of the oldest living species in the universe. Based on the planet Oa at the center of the universe, the Guardians repressed their emotions billions of years ago, and act in cold logic. They work to preserve life throughout the universe through various groups they create or empower. Their most successful group has been the Green Lantern Corps, a 7200 galaxy-spanning police force, each equipped with a green power ring capable of tremendous feats.