"In the beginning, humanity has been ravaged by the destructive creatures known as the Grimm.
During the early years of mankind's advent on the world of Remnant, the Grimm massacred thousands due to the lack of weapons to defend themselves.
In this time, humanity found a way to fend off the beasts, the power of Dust.
With Dust, humanity was able to flourish, fending off Grimm attacks and being able to establish villages; and then not long after, kingdoms.
The kingdoms that rose on Remnant was Vale, Vacuo, Atlas, and Mistr