Purva Mimamsa, also known as Karma Mimamsa, is a school of Hindu philosophy that places great emphasis on the performance of Vedic rituals and adherence to dharma (duty or righteousness). The school was founded by Jaimini and its main text is the Mimamsa Sutras.

In the view of Purva Mimamsa, the caste system, also known as varna, is an integral part of the Vedic dharma. The caste system is based on the belief that individuals are born into a particular caste based on their karma (actions) in their past lives. This system divides society into four varnas - Brahmins (priests and scholars), Kshatriyas (warriors and rulers), Vaishyas (merchants and farmers), and Shudras (laborers and artisans). The Brahmins are considered the highest caste and the Shudras the lowest.

According to Purva Mimamsa, the caste system is essential for maintaining social order and harmony. Each varna has its own set of duties and responsibilities, and by performing their duties diligently, individuals can attain moksha (liberation from the cycle of rebirth). The caste system is also seen as a means of preserving the knowledge and traditions of the Vedic texts, as each varna has a specific role in performing Vedic rituals.

Purva Mimamsa also believes that the caste system is not based on birth alone, but also on one's qualities and actions. This means that individuals can move up or down the caste hierarchy based on their actions and behavior. However, this view has been criticized for perpetuating social inequality and discrimination against lower castes.

In addition, Purva Mimamsa views the caste system as a means of promoting dharma in society. Each caste is expected to fulfill its duties and responsibilities in accordance with dharma, which ultimately leads to the well-being of society as a whole. This also includes the duty of the higher castes to protect and provide for the lower castes.

However, it is important to note that Purva Mimamsa does not condone the mistreatment or exploitation of lower castes. It emphasizes the importance of treating all individuals with respect and dignity, regardless of their caste. The school also promotes the concept of universal brotherhood, where all individuals are seen as equal in the eyes of God.

In conclusion, Purva Mimamsa views the caste system as an integral part of the Vedic dharma and a means of maintaining social order and promoting dharma in society. While it recognizes the importance of the caste system, it also emphasizes the need for treating all individuals with respect and promoting equality among all castes.