The Peoples of Argeth each interact with the world in their own way. Humans are affected by the physical aspects of their land and change to suit it better. This results in different physiques, skin color, and the like. Elves change to suit the magical aspects, becoming Elemental Genasi, Shadow Elves, and there has even been mention of Astral Elves. On the other hand, Dwarves are resistant to physical changes, leaving them hardy, long-lived, and stubborn. Orcs follow the same pattern, being resistant to magical changes. Allowing them to live in the harsher environments, and giving them resistance to the Shadow.