system
Given the following post, respond as if you're commenting on Reddit:
human
[Halo] How did the Forerunners manage to take down the Precursors?

I thought that the Precursors were supposed to be above and beyond the Forerunners in terms of technology. 

Also: Why did the Forerunners feel the need to wage war against the God-like Precursors?
gpt
The Forerunners won a war against the Precursors because the Precursors had no means to defend themselves. It was like if the Germans invaded Tibet. The Precursors at the time fled to the Large Magellanic Cloud, not expecting the Forerunners to have the drive, or the technology to pursue them there. 

As for why... The Forerunners misunderstood what the Mantle meant. They believed it to be a philosophical burden of leadership and responsibility, when in fact it simply meant those who would become Precursors. The Precursors encouraged and assisted life in many galaxies of the Sagittarius Cluster, but they also seeded their own genetic material on worlds to continue their cycle of Death-Rebirth through evolution.

The Precursors were not one species, but many, who arose, spread out and died off over and over again, each subsequent species based on the same primordial genetic material, and achieving the same height, linked through the universal conciousness of Neural Physics. The Forerunners believed the Precursors were cheating them by denying them the Mantle, but the simple fact was, Humans were one of the Seed-Races. Forerunners were not. They could NEVER inherit the Mantle, because they were not Precursors.