Dwarves

"For our brothers of stone have abandoned the Path of Life and so hath disgraced the All-Father eternal."

-Inscription on an Ancient Dwarven Monolith dating back to the Pre-Dawn Era.

 The Dwarves, like the Elves and Orcs, the Dwarves schismed sometime before history. When the World split into the Silver Isles and Great Tree, half of the Dwarves stayed on the tree, and the other transferred to the Silver Isles. They both refuse to acknowledge the other party. They have very different cultures and traditions.