Hinduism (Yugas)

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The yugas are the four world-ages of Hindu cosmology — successive epochs through which the world declines, dissolves, and begins again. They are named, in order, the Krita (or Satya) Yuga, the Treta Yuga, the Dvapara Yuga, and the Kali Yuga; together the four make a single great cycle, a mahayuga, after which the sequence repeats. The scheme appears already in the epics and is elaborated in the Puranas, where the ages acquire their enormous spans and their precise arithmetic. The names themselves are borrowed from the throws of an Indian dice game — Krita the winning cast, Kali the losing one — and the borrowing is apt, for the four ages are a single throw of the world running steadily from best to worst.

The defining feature is descent. The first age is whole — dharma, the moral and cosmic order, stands as if on four legs — and each age that follows loses one, so that righteousness, lifespan, and human stature diminish step by step. The tradition gives this image a body: dharma is pictured as a bull, standing four-square in the Satya Yuga and losing a leg in each age that follows — three legs in the Treta, two in the Dvapara, and in the Kali a single trembling leg. The four legs are traditionally named the supports of righteousness — tapas, austerity; shauca, purity; daya, compassion; satya, truth — withdrawn one by one as the world coarsens. By the fourth age, the Kali Yuga, dharma stands on that one leg: this is the age of strife, the shortest and the worst, and Hindu reckoning generally places the present within it, dated by tradition from a point shortly after the close of the Mahabharata war.

The arithmetic is exact and vast. By Puranic reckoning each age is measured in divine years — one divine year being three hundred and sixty human ones — and the four stand in a ratio of four to three to two to one, so that the cycle shortens as it darkens. In human years the figures run from the Satya Yuga’s 1,728,000, through the Treta’s 1,296,000 and the Dvapara’s 864,000, to the Kali Yuga’s 432,000; every span is built from that last number, the smallest unit of the world’s decline. The four together make a mahayuga of 4,320,000 human years. Each age is bracketed, further, by a dawn and a dusk — the sandhya periods, a tenth of the age at either end — as though the tradition would not let even an epoch begin or close without a threshold.

The yugas nest inside still larger frames. Seventy-one mahayugas make a manvantara, the reign of a single Manu, the progenitor whose name also stands behind the flood the tradition tells (which belongs to the cosmic dissolution treated under comparative-flood-myth, and is not retold here); fourteen such Manus reign in succession. A thousand mahayugas make a kalpa, a day in the life of the creator Brahma, at the end of which the worlds are withdrawn into an unmanifest rest — a pralaya — through an equal night, after which creation resumes with the next day. A hundred years of such days and nights are the life of Brahma, closed at last by a total dissolution, a maha-pralaya, in which even the creator is reabsorbed. By the standard reckoning the present falls deep within this scheme: in the fifty-first year of the current Brahma, the seventh manvantara, the twenty-eighth mahayuga, and within it the early Kali Yuga, some five thousand years elapsed of its four hundred and thirty-two thousand. Time here is neither a line nor a single circle but a vast, patient recurrence — dissolution and renewal without final end, cycles turning inside cycles.

The traditional onset of the present age is given with surprising precision: 3102 BCE, a midnight in mid-February by the proleptic reckoning, held to begin with Krishna’s departure from the world, which ended the Dvapara Yuga some thirty-five years after the great war. The astronomer Aryabhata fixed the same epoch in 499 CE and anchored Indian astronomical chronology to it; modern scholars debate whether the date is genuinely ancient or a figure back-computed from the heavens, but the tradition holds to it as the hinge on which the present age turns.

Within the Vaishnava traditions especially, the turning of the ages is bound to the avataras, the descents of Vishnu, who is said to enter the world when dharma falters to restore it; the Bhagavad Gita gives this teaching its most quoted form. What the doctrine offers, in the end, is a way of placing the present without despairing of it. The Kali Yuga is a grim diagnosis — a measured account of why the world should feel coarse and the old order lost — yet it is also the age in which release is said to be most readily won, since a little devotion now counts for what once demanded vast austerity. The same cosmology that names this the worst of times names it, for the devotee, among the most forgiving. The ages turn regardless; the texts hold both judgments at once, and do not resolve them.

This patient, nested, billion-year time stands in sharp structural contrast to the linear, once-through time of the Abrahamic traditions — a single creation, a single history, a single end. The wider philosophy of recurrent time, and its strange echoes elsewhere, belong to eternal-recurrence; it is worth marking only that where Nietzsche’s eternal return is offered as something to be affirmed, Indian thought reads the wheel as that from which the soul seeks release. The modern age has produced its own revision of the scheme: Swami Sri Yukteswar, in The Holy Science of 1894, rejected the Puranic million-year spans as the residue of calculation errors that crept into the almanacs late in the descending Dvapara, when darkened reckoners misread the figures. In their place he set a cycle of twenty-four thousand years tied to the precession of the equinoxes — an ascending arc of twelve thousand and a descending arc of twelve thousand, each passing through all four ages — and placed the world in an ascending Dvapara since around 1699, rising rather than falling. It is a twentieth-century reinterpretation, not the classical doctrine, and reverses its mood; that the scheme could be turned that way at all shows how readily so vast a frame accommodates the age that reads it.

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→ Related: Eternal Recurrence · Comparative Flood Myth · Reincarnation · Karma