Dwarves

The oldest myths of the creation of the world always mention the dwarves: Short, stout beings who discovered the secret of Ember-powered clockworks, and, with it, conquered all of Vilderan and much of the rest of the world. But their lust for Ember led them to make war on the dragons, and, ultimately, brought them to the brink of destruction. As the dwarves' power waned, the races they had subjugated rose up and decimated them, sacking their glorious cities and plundering their precious Ember-powered machines.

All that is left now of the once-mighty dwarven empire are their dead, grotesquely animated by the corruption of Ember, and their wondrous machines; all still steadfastly defending their deserted mines and ruined cities from invaders who never come.

Source

 * Official Torchlight 2 site