Traditional Indian
society was based around a series of endogamous, or intermarried, groupings
known as jatis ("birth").
The group's hereditary occupation, over which each group had
a monopoly, was how these jatis were structured (and how their social rank was
decided).
The Kapus were farmers in traditional civilization.
The Kapus are the largest landholding tribe in most of
contemporary Andhra Pradesh, notably in the area bordering modern Tamil Nadu.
You may also want to read more about Hinduism here.
Be sure to check out my writings on religion here.