Those among the Golden Age people in whom excessive action of Rāja develops some Tama as well, and partly covers the Sattwa Attribute, form yet another distinct caste. They are called Vaishyas. While the Kshatriyas occupy themselves in taking over the control and government of countries and peoples, the Vaishyas take to the occupation of agriculture, commerce and raising of cattle, as much in their own individual material interests as in the interests of all humanity. In the Golden Age, owing to the fulness of spirituality within Nature, all kinds of grains grow wild and abundant. With the decrease of that spirituality towards its end, these natural products of the earth diminish in quality and quantity, while the growing material instincts in people bring about their larger consumption, thereby creating greater demand for them. This increased demand is supplied by cultivation by the Vaishyas. Those, again, among the Golden Age people who, owing to the predominance of the Tama Attribute in them, are filled with envy and greed, and become untruthful and devoid of clean habits of life and take to all sorts of low means and ways for their living are classed as Sudras. The Kshatriya rulers compel these Sudras for their own good as well as the good of all other classes of people to take service under the three upper castes as domestic servants, so that by contact and association with their masters and by the examples of their purer ideas and habits of life they may be elevated in morals and conduct. The science and wisdom which are the foundation of the caste system of the Silver Age people and which still form the backbone of the degenerate remnants of these primeval people, now known as Hindoos, are worthy of study of all civilized mankind of the present day. It is the scientific law of the caste system which has preserved the indestructible individuality of the Hindoos as a race; it is the chief source of strength which has supplied their inexhaustible vitality as a nation; the never failing force which has insured the permanency of their existence on the face of the globe. It is a system, the absence of which in the organization of all other human societies, modern and ancient, has been the cause of their decay and death. The Hindoo caste system is based upon laws of the inmost science of life, the laws which modern scientists are trying so hard and yet so hopelessly to discover and understand through wrong processes of investigation. Modern scientists are boastful of their achievements in the field of discovery of Nature's laws and imagine they have learned almost all of Nature's secrets, while in truth they know but a few of her surface-laws the mainsprings of which are to be found deep down in the mental and spiritual strata of which they even dream not of—a realm which must ever remain closed to purely objective investigation.