Humans, a relatively young race, are the dominant race of Eberron.
Human Lands: Human culture was born on the continent of Sarlona, with the first settlers sailing from Sarlona’s western coast to the region of Khorvaire now called the Lhazaar Principalities. From there, they spread across the continent of Khorvaire, disrupting the placid elven empire of Aerenal and leaving ruined goblinoid kingdoms in their wake. With the arrival of the Inspired in Sarlona, human dominance on that continent came to an end. The humans of Khorvaire feel no particular connection to their ancestral homeland. Indeed, most don’t even realize their ancestors came from that distant land.
Dragonmarks: Humans control many of the dragonmarked houses. House Cannith carries the Mark of Making and has a lock on the trades of repair and manufacturing. House Orien carries the Mark of Passage, dominating the courier, shipping, and transportation trades. House Deneith carries the Mark of Sentinel, allowing its members to dominate the field of personal protection. House Vadalis carries the Mark of Handling, making its members foremost in the business of livestock breeding and training.