Caste system in Kerala

The caste system in Kerala differed from that found in the rest of India. While the Indian caste system generally divided the four-fold Varna division of the society into Brahmins, Kshatriyas, Vaishyas and Shudras, in Kerala, that system was absent. The Malayali Brahmins formed the priestly class and Nairs formed Aristocracy, rank immediately below malayali Brahmins. Brahmins labeled all other castes as "Sat-sudra", "Shudra" and "Avarna" based on their origin and ritual rank. The exception to this were the military elites among the Samantha Kshatriyas and the Nairs, who were ritually promoted to the status of Kshatriya by means of the Hiranyagarbha ceremony. This was done so that the Samanthans and Nairs could wield temporal ruling powers over the land, as they constituted the aristocratic class.

Like the rest of India, the lower castes touching the upper castes was termed as "pollution," but only in Kerala did the lower castes pollute not just by touch but also by merely approaching an upper caste. For example, a Nair could stand next to a Namboodiri, whereas an Ezhava was forbidden to either approach or touch either the Namboodiri or the Nair. In South India, only in Kerala did there appear a warrior lineage approximate to the Kshatriya model, which corresponded to the aristocratic families among the Samantan Nairs, Samantha Kshatriyas, Pillais and Kurups of travancore and the Kiryathil Nairs.