The story

The war at the end of this epic is decided long before any of its warriors are born. It is decided by a young man making a promise to a fisherman.

Shantanu, king of Hastinapura, had a son and heir named Devavrata — brilliant, loved, and already acknowledged as the finest archer of his generation. Then Shantanu fell in love with Satyavati, a fisherman's daughter. Her father would agree to the marriage on one condition: that Satyavati's sons, not Devavrata, would inherit the throne. Shantanu could not accept it, and would not say why he had grown silent and sleepless.

Devavrata found out. He went to the fisherman himself and renounced the throne on the spot. The fisherman was unmoved — Devavrata's own sons might one day contest it. So Devavrata made a second vow, and it is the one the epic never lets anyone forget: he would never marry, never father a child, and remain celibate for life. The gods are said to have rained flowers, and from that day he was called Bhishma — "the one of the terrible vow."

It cost exactly what a moment's thought would have predicted. Satyavati's two sons both died young — one in battle, one of illness — leaving the throne empty and the queens Ambika and Ambalika widowed and childless. The line Bhishma had given up everything to protect was about to end, and the one man who could have continued it had sworn not to.

What Satyavati did next is one of the passages modern readers find hardest, and the text does not soften it. She summoned Vyasa — her own son, born before her marriage, an ascetic who had lived apart in the forest — and invoked niyoga: the practice by which a designated man fathers children on behalf of a dead or incapable husband, the children counting as the husband's. It was a recognised legal institution of the period, not a scandal, and the epic states it plainly as law rather than as intrigue. But it was also not a thing anyone in the story wanted, and the text records the cost in the bodies of the women it was performed on.

Vyasa came from the forest unwashed and matted, and each queen reacted. Ambika shut her eyes; her son Dhritarashtra was born blind. Ambalika went pale; her son Pandu was born pale. Sent a third time, Ambika substituted a serving woman, who met Vyasa without fear — and her son Vidura was born whole, wise, and permanently ineligible for the throne by his mother's rank.

Three sons, then. A blind one, a pale one, and the wisest of the three barred from ruling. The succession was contested before any of the cousins could walk.

Dhritarashtra was the elder, but the court passed him over: a blind king could not lead armies, and the objection was practical rather than symbolic. Pandu ruled instead — and then a curse in the forest made it fatal for him to touch his wives, so his own five sons came through another invocation of the same law: Kunti calling on gods, having been given that boon in her girlhood. Dharma gave Yudhishthira. Vayu gave Bhima. Indra gave Arjuna. The Ashvins gave Nakula and Sahadeva to Madri. Pandu died in the forest; Madri followed him onto the pyre; Kunti brought five boys back to a city that had not expected them.

Dhritarashtra now held the throne he had once been denied — and had a hundred sons of his own, the eldest of them Duryodhana.

So the quarrel is structural, not personal. Two branches, each with a real claim. Yudhishthira is the eldest of the cousins and son of the king who actually reigned. Duryodhana is the eldest son of the king who sits on the throne now and who was denied it first. Neither claim is frivolous, and no one in Hastinapura can say cleanly which is stronger — least of all Bhishma, who has authority over both branches and a vow that prevents him from ever being an interested party.

That is what the Mahabharata sets up in its opening book. Not a story of a good side and an evil side, but a succession with two defensible answers, presided over by elders whose own commitments have made them unable to decide it. Everything that follows — the burning house, the rigged dice, the eighteen days at Kurukshetra — grows out of a question the family could not settle at the beginning and would not stop asking.

Who appears, and what it argues

• Theme: The binding vow
• Theme: Kinship and enmity

Elsewhere in this parva

• The house of lac — A guest house built to burn: the first attempt on the Pandavas' lives, and the escape that lets them be thought dead.
• Draupadi's svayamvara — An archery test won by a supposed dead man in disguise, and a mother's careless word that binds five brothers to one wife.

Questions to explore

• Why does Bhishma's vow of celibacy destabilise the very line it was meant to protect?
• Is Dhritarashtra passed over for his blindness, or for what the court fears it means?