| "In every age, there is a class of men who are intellectual class. So this intellectual class of men is called brāhmaṇa. And the next class, the administrative class. Those who takes part in politics for administration of the state, government, they are called kṣatriyas. The actual meaning of kṣatriya is 'one who protects a man from being hurt by others'. That is called kṣatriya. That means, that is the business of the administrators, government. So brāhmaṇa, kṣatriya, then vaiśyas. Vaiśyas means productive class, who are interested in producing things for consumption by the people. Mercantile class, industrialists, they are called vaiśyas. And the last class, fourth class, they are called śūdras. Śūdras means that they are neither intellectual, nor they're administrator, nor industrial or mercantile, but they can serve others. That's all. So it is said that kalau śūdra sambhava. In the modern age, people are being taught in the university to become śūdra."