There are 5 different castes in the Indian caste system
Brahmins
Whelp off to work
Kshatriya
Vaishya
The Brahmins are at the very top of the castes system. They usually are teachers, priests, and/or protectors of sacred learning. They are more wealthy also.
Sudras
The Kshatriyas are right below the Brahmins. They are usually warriors or work in the military. Some are rich, some are poor.
Untouchables
Vaishyas are third in the caste system. They are usually traders or money lenders.
Sudras are at the bottom of the caste. They make up the majority of the population. They are mostly workers.
The Untouchables are at the very bottom of the caste. They aren't even connected to the caste itself. They are street and sewer cleaners.