Ezhuthachan (caste)
They mainly belong to the districts of Kozhikode, Malappuram, Palakkad and Thrissur of Kerala, has also presence outside and other parts of India. There are more people in the teaching sector in the community. Ezhuthachan is a caste who have teaching as a traditional profession. There is an organization representing the community as "Ezhuthachan Samajam".
Tenochtitlan
Tenochtitlan can be considered the most complex society in Mesoamerica in regard to social stratification. The complex system involved many social classes. The "macehualtin" were commoners who lived outside the island city of Tenochtitlan. The "pipiltin" were noblemen who were relatives of leaders and former leaders, and lived in the confines of the island. "Cuauhipiltin", or eagle nobles, were commoners who impressed the nobles with their martial prowess, and were treated as nobles. "Teteuctin" were the highest class, rulers of various parts of the empire, including the king. "Tlacohtin" were individuals who chose to enslave themselves to pay back a debt; they were not slaves forever and were not treated as badly as typical slaves seen in other ancient civilizations worldwide. Finally, the "pochteca" were merchants who traveled all of Mesoamerica trading. The membership of this class was based on heredity. "Pochteca" could become very rich because they did not pay taxes, but they had to sponsor the ritual feast of Xocotl Huetzi from the wealth that they obtained from their trade expeditions.