G-23 Paxilon Hydrochlorate or "Pax" is a chemical compound added to the air processors in order to pacify the populace, by The Alliance. An Alliance research team on Miranda discovered that the Pax was effective with 99.9% of people. It was such an effective means of pacifying that the people stopped doing anything, they simply waited for death. However, a tenth of a percent of the population had the opposite reaction. They became highly aggressive, committing unspeakable acts. These people would come to be known as Reavers.

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