Religious event
When the great god Chazos left the Flying Flux, the Chazra had just begun and the world was still bathed in naivety. Because of this, a world-wide cry to obey every one of their creator's commands led to a ten-year period known as the "Dogma Decade", which ended poorly.
The first generation of Fluxers were by far the most peaceful, but incredibly unfamiliar with the cruelties of nature. Being under the protection of a god gave them a false sense of security, and while they might have known of death, the child-like beings had never truly understood what it meant to watch something die.