Jehkoh@aol.com (Jehkoh@aol.com) writes:
Perhaps the Forerunner suffered from a plague of some sort that altered their genetics, resulting in mutations and disfigurations. They realized they were altered beyond help and after some time figured out they would harm fellow Forerunners, and (since they were the master alien race) preserved themselves within Halo or as an act of selfishness, preserved themselves within Halo and waited for someone to destroy their food, so they could exist without harming others personally, (only by killing the others, impersonally. I prefer my first thoery. They preserved themselves within Halo. Perhaps Halo had already been constructed before the Forerunner were plagued, and it's purpose (weapons of mass destruction) was to be for something else.