The work is divided into four divisions of social order: brāhmaṇa, kṣatriya, vaiśya, śūdra. The intelligent class of the society, they are working in a different way, and the administrator class of society, they are also working in a different way. The mercantile society, the productive society, they are also working in a different way, and the laborer class, they are also working in different way. In the human society, either as laborer or as mercantile men, or as politicians, administrators, or as the highest class of intelligent class of men in literary career, scientific researches, everybody is engaged in some work, and one has to work, struggle for existence.