The Holy Prophet also imprinted upon the minds of the people the pragmatic value of this fundamental principle of Islaam, i.e., Divine Unity and human integrity. This concept strikes at the very root of all types of man-made distinctions, e.g., those of race, colour, creed and language and completely sweeps off all kinds of hierarchical privileges of life prevailed social and political discriminations. It was a pronouncement of very great significance. Herein was sounded the death knell of the doctrine of polygenism ascribing multiple ancestry to mankind and the idea of castes or classes forming a barrier to common, humanity. There is no distinction between man anman. All are equal, because they are descendants of the same parents. Superiority of one over another in this vast "brotherhood does not depend on nationality, wealth or rank but on one's piety, straightforwardness, sincerity and conscious adherence to the command of Allah in the Holy Quraan and the Sunnah of the Holy Prophet Salallaho Alaihi Wasallam.