In the World of Mushoku Tensei there's 4 continents, the central continent where mostly humans live, the demon continent where live mainly the demonic tribes, the Begaritt continent where mostly ex-adventurer humans live in, the strenght of monsters there is equal to those of demon continent, the Milis continent, that continent is inhabited by humans in the Holy Country of Millis in the west, and various other races like elves, or beast folk in the great forest in the east.