Humanity is the most populous race on Braelun. Go figure. Most of them are clustered in the major kingdoms, however, or in many a village with some sort of sworn fealty to one of said kingdoms. While generally agreeable with all the world’s races, humans do have a touch of arrogance to their personalities, so racism can crop up from time to time.
Humans play as per their outline in the PHB, and can join any organization outlined in the World section on the main page, seeing as how they started or at least organized all of them. All classes are open to human characters.