Vaiśya became Viśpati - the Landlord and Gṛihapati - the Lord of the Manor. To protect his wealth he had to depend on two other professions – the priest and warrior – Brahmin who guarded him against the wrath of nature and the unknown, and Rājanya who kept at bay the greed and envy of neighbors. Others who helped the landlord with skilled and unskilled services found themselves in a class called Śūdra. The seed of the caste hierarchy found in the Puruṣasūkta hymn of the Ṛgvēda became manifest.
