The caste system in ancient India had been executed and acknowledged during, and ever since, the Vedic period that thrived around 1500—1000 BCE. The segregation of people based on their Varna was intended to decongest the responsibilities of one's life, preserve the purity of a caste, and establish eternal order.

What is the Varna system and why was it created?

Purpose of the Varna system

The division of the varna is to distribute the responsibilities among various people and to maintain the purity of caste and establish eternal order. This system is believed to avoid conflicts within business and encroachment on respective duties.

How did Varna system start?

Western Theory

According to this theory, the varna originated with the arrival of Aryans in India around 1500 BC. ... The Aryans organized among themselves into three groups, namely, Rajayana (later changed to Kshatriyas), Brahmins and the Vaishyas. Kshatriya was defined as kseeyate traayate iti ksatriya.