Modern society does not aim at fulfilling the mission of human life, which is to go back home, back to Godhead. To fulfill this mission, the system of varna and asrama must be followed. When the system is followed rigidly and consciously, it fulfills this mission, but when followed indirectly, without the guidance of superior authority, it simply creates a disturbing condition in human society, and there is no peace and prosperity.

From Srila Prabhupada’s Krsna Book ch. 80: The Meeting of Lord Krsna with Sudama Brahmana