War and Peace opens in 1805 in the drawing rooms of St. Petersburg, where the cream of Russian society gathers to gossip about Napoleon and to arrange marriages and careers. From this glittering, half-frivolous world Tolstoy draws out his central figures: the awkward, searching Pierre Bezúkhov, who unexpectedly inherits a fortune; the disillusioned Prince Andrew Bolkónski, who longs for glory; and the warm, impulsive Rostóv family, above all the young Natásha. The talk of war is at first just talk among people whose real concerns are status and feeling.
War soon stops being conversation. Russian armies march into Austria and are battered at Austerlitz, where Prince Andrew, wounded and lying under the vast sky, sees the emptiness of the ambition he had cherished. Back home the narrative follows the slow business of living: estates and debts, courtships and betrayals, a duel, a near-elopement, the deaths of parents. Tolstoy moves without strain between the council of war and the ballroom, treating both as ordinary human scenes rather than separate registers of high and low.
In 1812 Napoleon invades Russia, and the private stories are swept into the path of the Grande Armée. The set piece is Borodinó, a battle Tolstoy describes as confused, accidental, and beyond any general's command, including Napoleon's. The old commander Kutúzov is shown not as a genius imposing his will but as a man wise enough to wait, trusting patience and time. After Borodinó the Russians abandon Moscow, which is given over to looting and fire, and the French occupation becomes the beginning of their destruction.
Pierre, who has drifted through Freemasonry, marriage, and aimless wealth, is taken prisoner in the burning city. In captivity he meets the peasant Platón Karatáev, whose unforced, rounded acceptance of life teaches Pierre more than any book or system had. Stripped of comfort and certainty, Pierre arrives at a simple conviction that life itself is everything and that to love life is to love God. The French retreat in winter collapses into a ruin that no plan ordered, and the survivors return changed.
The first epilogue carries the survivors into the calm of family life years later, where the grand passions have settled into marriages, children, and small daily duties. The second epilogue drops the story entirely and argues directly: that historians wrongly credit kings and commanders, that the movement of nations is the combined effect of countless individual acts, and that free will and necessity must both be acknowledged. The novel ends not with a hero's triumph but with a problem about how history really works.