Dr. B R Ambedkar.

6 [Caste prevents Hindus from forming a real society or nation]
	[1:] Caste does not result in economic efficiency. Caste cannot improve, and has not improved, the race. Caste has however done one thing. It has completely disorganized and demoralized the Hindus.
	[2:] The first and foremost thing that must be recognized is that Hindu Society is a myth. The name Hindu is itself a foreign name. It was given by the Mohammedans to the natives for the purpose of distinguishing themselves [from them]. It does not occur in any Sanskrit work prior to the Mohammedan invasion. They did not feel the necessity of a common name, because they had no conception of their having constituted a community. Hindu Society as such does not exist. It is only a collection of castes. Each caste is conscious of its existence. Its survival is the be-all and end-all of its existence. Castes do not even form a federation. A caste has no feeling that it is affiliated to other castes, except when there is a Hindu-Muslim riot. On all other occasions each caste endeavours to segregate itself and to distinguish itself from other castes.
	[3:] Each caste not only dines among itself and marries among itself, but each caste prescribes its own distinctive dress. What other explanation can there be of the innumerable styles of dress worn by the men and women of India, which so amuse the tourists? Indeed the ideal Hindu must be like a rat living in his own hole, refusing to have any contact with others. There is an utter lack among the Hindus of what the sociologists call "consciousness of kind." There is no Hindu consciousness of kind. In every Hindu the consciousness that exists is the consciousness of his caste. That is the reason why the Hindus cannot be said to form a society or a nation.
	[4:] There are, however, many Indians whose patriotism does not permit them to admit that Indians are not a nation, that they are only an amorphous mass of people. They have insisted that underlying the apparent diversity there is a fundamental unity which marks the life of the Hindus, inasmuch as there is a similarity of those habits and customs, beliefs and thoughts, which obtain all over the continent of India. Similarity in habits and customs, beliefs and thoughts, there is. But one cannot accept the conclusion that therefore, the Hindus constitute a society. To do so is to misunderstand the essentials which go to make up a society. Men do not become a society by living in physical proximity, any more than a man ceases to be a member of his society by living so many miles away from other men.
	[5:] Secondly, similarity in habits and customs, beliefs and thoughts, is not enough to constitute men into society. Things may be passed physically from one to another like bricks. In the same way habits and customs, beliefs and thoughts of one group may be taken over by another group, and there may thus appear a similarity between the two. Culture spreads by diffusion, and that is why one finds similarity between various primitive tribes in the matter of their habits and customs, beliefs and thoughts, although they do not live in proximity. But no one could say that because there was this similarity, the primitive tribes constituted one society. This is because similarity in certain things is not enough to constitute a society.
	[6:] Men constitute a society because they have things which they possess in common. To have similar things is totally different from possessing things in common. And the only way by which men can come to possess things in common with one another is by being in communication with one another. This is merely another way of saying that Society continues to exist by communication—indeed, in communication. To make it concrete, it is not enough if men act in a way which agrees with the acts of others. Parallel activity, even if similar, is not sufficient to bind men into a society.
	[7:] This is proved by the fact that the festivals observed by the different castes amongst the Hindus are the same. Yet these parallel performances of similar festivals by the different castes have not bound them into one integral whole. For that purpose what is necessary is for a man to share and participate in a common activity, so that the same emotions are aroused in him that animate the others. Making the individual a sharer or partner in the associated activity, so that he feels its success as his success, its failure as his failure, is the real thing that binds men and makes a society of them. The Caste System prevents common activity; and by preventing common activity, it has prevented the Hindus from becoming a society with a unified life and a consciousness of its own being.