Rates were a set of caste-like social statuses in Forerunner society.[1] Forerunners from various rates were represented on the Forerunner Council.[2]

Known RatesEdit

Rate Description Ranks and Positions
Builder Builders designed and constructed various types of machines and artificial intelligences.[3]
Engineer Unknown duties[2] Unknown
Juridical Unknown duties[4] Unknown
Lifeworker Lifeworkers cared for and preserved living beings.[3]
Miner Miners were responsible for stellar and planetary engineering.[3] Unknown
Warrior-Servant Warrior-Servants were the main military force of the Ecumene.
Myrmidon Special forces who guarded the Forerunner Council and other vital installations. Rate and dispensation never fully established.[3] Unknown


  1. Halo: Cryptum - Page ???
  2. 2.0 2.1 Halo Waypoint: Halo: Cryptum Glossary (Defunct, copy on Wayback Machine)
  3. 3.0 3.1 3.2 3.3 Halo: Warfleet – An Illustrated Guide to the Spacecraft of Halo - Pages 90-92
  4. Halo: Silentium - Page ???