The Mahi Tahi consists of the three different scaled races that inhabit New Haven, and is still the dominant society on the continent, even after the landing and subsequent settling of the refugees from the mainland. They are not the only intelligent races to inhabit the land, but they are by a wide margin the most numerous and organized.
The Mahi Tahi consist in roughly equal parts of Lizardfolk, Wyvaran, and Viskanya. Centuries ago, these three races were independent of one another and fought bloody, viscous wars regularly for dominance. The Holy City of Kotahitanga served as neutral ground for the first peace talks long ago and became the capital of the empire. The process of integration was slow, but it has been so long since that time that few without and fewer within question the unity of the three races.
There aren’t any significant limitations on the path a citizen may choose based solely on his race, but as with any multifaceted society, there are predominant tendencies that appear over time.