The more one becomes sinful, he becomes degraded more and more. Therefore there are divisions of the society. That should be. Unless human society it will be divided into the principles, as they are spoken by Kṛṣṇa:
- cātur-varṇyaṁ mayā sṛṣṭaṁ
- guṇa-karma-vibhāgaśaḥ
- (BG 4.13)
Guna-karma: according to quality and work. Just like if you are qualified medical practitioner, you have passed the medical examination, that is your quality. But you must practice also as a medical man; then people will call you as physician. If you simply pass your medical examination and sit down at home, nobody will call you physician. When you practically engage yourself in medical business, then people will call you physician. If you pass your law examination, don't go to the court, don't practice, nobody will call you lawyer. Any business you see. Suppose you know how to deal with electrical fittings. But if you do not do any business, if you sit down at home, nobody will call you electrician. When you practice, then you will be called electrician—with knowledge.
Similarly, the society should be divided with quality and work. That is scientific society. That quality can be divided into four, because there are three qualities in the material nature—goodness, passion and ignorance. So goodness, those who are qualified in goodness, they can be called as brāhmin. Those who are qualified with passion, they can be called a kṣatriya. Kṣatriya means the politicians, administrators. brāhmin means highly learned scholars, philosophers, theosophist, theologist, priests—like that.