[quote]I have no idea how they were able to overcome the race that created the Flood[/quote] If you intend to read [i]Silentium[/i], I suggest you don't click on the spoiler. [spoiler]1. The Precursors arguably are the Flood. In [i]Silentium[/i], the Flood's origins are described as mutations from Precursor remains. 2. Although the forerunners were powerful, the Precursors also didn't fight back; they supposedly were too awed by their creations (Precursors seeded life in the galaxy).[/spoiler]