Manhunters

Before they were Guardians, long ago thet were known as the Maltusian race. The Maltusians were obsessed with bringing order to the universr and thus founded the Manhunters which aren't robots in E27 but a brotherhood of bounty hunters from all walks of life (for instance Lobo is a Manhunter and J'onn J'onzz's title of Martian Manhunter actually means something. Oh, and Kate Spencer and Miss Martian are J'onn's deputies).

The Maltusians still felt that the Manhunters could be improved somehow. When their research discovered the Emotional Spectrum, they thought this was the answer.

Links and References:

 * E27 Journal: Lantern Corps History Lesson
 * Manhunters Gallery