Dalit people traveling in the freight car. They are too poor to ever pay for a train ticket. They represent the lowest caste in India.
The term Dalit is a self-applied concept for those called the `untouchables` and others that were outside of the traditional Hindu caste hierarchy.
India`s caste system is perhaps the world`s longest surviving social hierarchy. A defining feature of Hinduism, caste encompasses a complex ordering of social groups on the basis of ritual purity.