craZy (Drow780@aol.com) writes:
The Forerunner created the Halos in order to store away the Flood and keep the universe safe. But, without a security system of any type, a younger race found a Halo, got on it, and foolishly releashed the Flood. The Forerunner, not having realised this until the Flood were too spread out to control, activated the Halos.
To make double sure that that sort of thing didn't happen again, the Forerunner created the Covenant. A sort of guard-dog of the Halos. The Forerunner then gave the Covenant advanced technology and built their instructions into the Covenant's religion.
But the religion/rules that were designed to protect the Halos, turned bad. Over time, they degraded and "Protect the Halos from intruders" turned into "Kill all who could possibly go to the Halos" or some such 'death to all' philosophy.