IN MAY 1916, a twenty-four-year-old Indian student stood before an anthropology seminar at Columbia University and read a paper on caste. He had been asked to address a scholarly audience unfamiliar with India’s social structure, and he opened with a disarming admission: subtler minds and abler pens had already tried to unravel the mysteries of caste, and the problem still remained, in his words, “in the domain of the unexplained, not to say of the un-understood.” He then proceeded, in thirty-two pages, to explain it.
The student was B. R. Ambedkar. The paper was ‘Castes in India: Their Mechanism, Genesis and Development’. It was his first major research which he wrote before he completed his doctorate at Columbia, his LSE thesis on the rupee, before he became a lawyer, a legislator, or even the principal drafter of the Indian Constitution. He was twenty-five when it appeared in the journal, ‘Indian Antiquary’ in 1917. More than a hundred years later, it remains one of the most precise and unsentimental analyses of how caste was built - and why it endures.
What makes the paper worth reading today is not just what Ambedkar concludes, but how he argues. He refuses every mystical or racial explanation for caste. He treats caste as a social institution produced by deliberate human decisions, identifying what those decisions were, who made them first, and how they spread. The result is an argument that moves from definition to mechanism to genesis – each step following from the last with the discipline of a mathematician eliminating false solutions before arriving at the correct one.
Caste in India
Ambedkar begins by highlighting what those who accept caste as natural tend to overlook: the population of erstwhile Indian subcontinent, which included Aryans, Dravidians, Mongolians, Scythians, arrived from different directions over centuries, fought and settled. Through their contact, a common culture evolved. India was, in his reading, a culturally homogeneous society before the genesis of caste. This matters because it makes caste a genuine problem requiring explanation. If Indian society had always been a collection of separate, mutually exclusive groups, caste would need no explanation, rather it would simply be an extension of that original separateness. But it is not. Caste, Ambedkar says, is ”a parcelling of an already homogeneous unit.” That is why it is difficult to explain, and precisely why previous scholars had failed.
Ambedkar’s ‘Castes in India’ offers an account of how caste was built, step by step, from the inside out, by people solving practical problems with the tools of social power available to them.
He then reviews the existing definitions of caste offered by Senart, Nesfield, Risley, and Ketkar and finds each of them incomplete. Senart emphasises pollution; Nesfield emphasises the absence of inter-dining; Risley emphasises occupational identity and common descent. Ambedkar’s objection to all of them is the same. They describe features of caste without identifying what is structurally essential to it. Some of these features, like pollution beliefs, exist in other societies that have no caste system. Others, like occupational grouping, are consequences rather than causes. None identifies the mechanism that produces and perpetuates caste as a system.
Ambedkar’s own answer is a single word, i.e., endogamy. Marriage within the group and the prohibition of marriage outside it is the one characteristic without which caste cannot exist. All the other features of caste are secondary or derivative. Occupation can change; food practices can vary; pollution beliefs can be altered. But if you can control whom people marry, you can control everything else. Endogamy is the lock on the door of the enclosed class.
The paradox, however, he identifies is that India was not originally an endogamous society. On the contrary, India practised exogamy where the clan system was so deeply embedded that even today marriage between members of the same gotra is treated as sacrilege. Endogamy was foreign to the people of India. Therefore, creating caste meant forcing endogamy onto an exogamous population, what Ambedkar calls ”the superimposition of endogamy on exogamy.”
As this was a deliberate development, it required mechanisms to sustain itself. Here Ambedkar exposes that most previous analysts had missed entirely. If a community wishes to be endogamous, it must maintain numerical balance between the sexes within the group. Marriage requires partners, and partners must be available. But death is uneven. When a husband dies before his wife, she becomes what Ambedkar calls, with clinical precision, a “surplus woman.” When a wife dies before her husband, he becomes a “surplus man.” Both are threats to endogamy, because both may seek partners outside the group and thereby break it open.
How does the group deal with this problem? Ambedkar enumerates that the surplus woman – the widow – can be burned alive on her husband’s funeral pyre, eliminating the problem entirely. If burning is impractical, she can be condemned to permanent widowhood, her sexuality and remarriage prospects extinguished, her body degraded so that she is no longer a source of allurement. The surplus man – the widower – poses a different challenge. Since men have always had more social power than women and cannot be treated the same way, he can be compelled to celibacy or renunciation, but this is impractical for most. The more workable solution is to provide him with a wife from within the group – a girl not yet of marriageable age, recruited early and reserved for him. This is child marriage.
Ambedkar’s conclusion is that: sati, enforced widowhood, and child marriage are not religious ideals or cultural traditions, but arithmetic solutions to the numerical problems created by endogamy. The philosophies built around them – the glorifications of the devoted widow, the celebration of pre-pubescent brides – came afterwards, to justify and sweeten what was already being done. As Ambedkar puts it: ”At all times, it is the movement that is most important; and the philosophies grow around it long afterwards to justify it and give it a moral support.”
Having established the mechanism, he turns to the question of origin: who did this first? His answer is the Brahmin priestly class. The evidence is in the distribution of these customs. Sati, enforced widowhood, and child marriage are observed in their strictest form only among Brahmins. Their observance among non-Brahmin castes is derivative and progressively less strict as one moves further from the Brahmin social position. If the customs spread from the top downward, the originating caste must be at the top. Manu did not create caste; caste existed before Manu. Manu codified and legitimised what was already in practice. The Brahmins could not have imposed this system on non-Brahmin populations by fiat as the spread of caste across India is too vast a social transformation for any single class to have imposed by force. What they could do, and did, was provide a model. And because the Brahmin class occupied a position of extraordinary religious prestige – treated as semi-divine, as the fountain-head of purity and authority – that model was imitated. Drawing on sociologist Gabriel Tarde’s laws of imitation, Ambedkar argues that imitation flows from the socially superior to the inferior, and that proximity intensifies it. Castes nearest to the Brahmins copied all three customs strictly; those further away copied two; those further still, only one; and the most distant copied only the underlying principle. The spread of the caste system across India is a map of this imitation.
Marriage within the group – and the prohibition of marriage outside it – is the one characteristic without which caste cannot exist. All the other features of caste are secondary or derivative.
The second mechanism of spread is what Ambedkar calls the mechanistic process. Some castes closed the door on others by enclosing themselves. When one group becomes endogamous, it forces adjacent groups into a kind of reactive endogamy by default. Any group that violates the code of an existing caste through heterodox religious belief, through occupational deviation, through inter-marriage with the wrong group, finds itself excommunicated. With no caste willing to absorb it, the excommunicated group has no choice but to become a caste itself. This is why castes multiply. Caste in the singular number is an unreality. Castes exist only in the plural.
Ambedkar’s synthesis
In the end, Ambedkar is not so presumptuous as to think his conclusions final. If the theory can be shown to be untenable, he says, he will be equally willing to give it up. What he asks for is not agreement but engagement in a fair and unbiased appraisal, with sentiment outlawed from the domain of science.
Ambedkar’s ‘Castes in India’ offers an account of how caste was built, step by step, from the inside out, by people solving practical problems with the tools of social power available to them. Caste is not divine. It is not ancient in the sense of being beyond human agency. It is an institution with a mechanism, a genesis, a history, and how what was made by human decisions can, in principle, be unmade by them.