So Humanity attacked and conquered other peaceful planets even Forerunner planets because they were fleeing for the Flood. After a 1000 year during war that eventually was born between the Humans and the Forerunners, the Humans were simply exhausted. The Forerunners almost exterminated the Humans and wanted to punish them etc... . After the Humans were devolved, the Forerunners learned that the Humans weren't actually attacking the Forerunners but fleeing from the parasite named the Flood. It was simply an act of survival. Now i wonder, how did i take a 1000 years to discover and understand the true nature of a war? If forerunners themselves were such an (almost) enlightened species they could have easily discovered the true reason of the sudden Human hostility despite their rivalry. -Couldn't the Humans just simply ask Forerunners to aid them in the battle against the Flood? The Forerunners saw themselves as the Guardians of the known galaxy, so they should have helped if needed, they were forced to help. -And even during the war that lasted 1000 years there must have been any trace of the Flood? -How many conversations can there be in a millenium? -How many interrogations during the war has there been? If i were a Forerunner and i would capture a Human, i would at first ask on which argument they attack. Or when Humans cleansed the surfaces of the Forerunner shield worlds, i as a Forerunner would simply ask why and then the Humans could have told about the parasite. No the Forerunners just reacted with a full scale armada.