Either all the various races understand the threat of the Demon Abyss disaster and set aside all their preconceptions, secretly building up their strength to face the disaster together, or under the threat of the Demon Abyss disaster, the various races go completely mad, mutually annexing each other in an attempt to seize all resources into the hands of a single race, and then facing the Demon Abyss with the ultimate strength.
Win and you live; lose and you die.
Both possibilities exist.
Chapter 495