I have said that at the end of the Golden Age and during its degeneration period, people's minds lose their tranquil equilibrium and look outwards for happiness. At this stage of the disturbance within Nature and humanity occasioned by the assertion of the Rāja attribute, the caste system comes into existence. The object of the caste system is to preserve as much order and harmony in human society as possible and prevent its disruption into individual units. In the Golden Age all the people are as one family, in the Silver Age they are divided into four families, divided according to their inclinations, habits and actions, and harmonious relations being established with one another through laws and interdependence. Those who still retain their perfected spirituality by subduing the influence of Rāja are called Brāhmans which means those who know or still dwell in Brahm—the Spirit of God. They are considered the head of the other castes because they are the embodiments of spiritual wisdom which is the chiefest requisite in the building of character and the higher development of the human soul. Some of them still retain their Golden Age habits of life, others clothe themselves with the barks of trees and live on fruits and nuts and roots in the forests, in huts made of tree-trunks and leaves. They pass their days and nights in contemplation of the Deity, the Divine Spirit and its Laws operating within Nature and inculcate these truths into the minds of the other classes of people. Those who, being unable to subdue the influence of Rāja, are swayed by passions and become bold, spirited and filled with material desires are called Kshatriyas. They become rulers of the other two castes. These are the first Kings and Rulers of men. But they rule according to the injunctions of inspired Codes of laws, laws which are propounded with the object of the highest good of humanity in view, as well as the propagation of peace and goodwill among all classes of people. According to these laws the King's first duty is to look to the material welfare of his subjects; the second is to protect them from injustice and aggression; the third is to help their moral and spiritual development; in short, the King's duty is to treat his subjects as his children. If any King fail to perform these duties to the satisfaction of his subjects or become aggressive towards them, he is immediately removed from his throne by the Brāhmans (Rishis), the all-powerful Brāhmans, who always have the welfare of God's creatures at heart, and whose spiritual powers are mightier than kingly weapons and might. The Brāhmans are called the "gods of earth" (Bhudevas) on account of their disinterested love of humanity and self-sacrificing devotion for its welfare and their irresistible spiritual and psychical powers to carry their objects for the good of humanity into action.