PURPORT

The varnasrama-dharma is meant for imperfect, conditioned souls. It trains them to become spiritually advanced in order to return home, back to Godhead. A civilization that does not know the highest aim of life is no better than an animal society. As stated in Srimad-Bhagavatam: na te viduh svartha-gatim hi visnum. A human society is meant for elevation to spiritual knowledge so that all of the people can be freed from the clutches of birth, death, old age and disease. The varnasrama-dharma enables human society to become perfectly fit for getting out of the clutches of maya, and by following the regulative principles of varnasrama-dharma, one can become successful. In this regard, see Bhagavad-gita (3.21-24).