Count Lev Nikolayevich Tolstoy, usually referred to in English as Leo Tolstoy, was a Russian writer. He is regarded as one of the greatest and most influential authors of all time.

The scion of prominent aristocrats, Tolstoy was born at the family estate, about 130 miles (210 kilometres) south of Moscow, where he was to live the better part of his life and write his most-important works. His mother, Mariya Nikolayevna, née Princess Volkonskaya, died before he was two years old, and his father Nikolay Ilich, Graf (count) Tolstoy, followed her in 1837. His grandmother died 11 months later, and then his next guardian, his aunt Aleksandra, in 1841. Tolstoy and his four siblings were then transferred to the care of another aunt in Kazan, in western Russia. Tolstoy remembered a cousin who lived at Yasnaya Polyana, Tatyana Aleksandrovna Yergolskaya (“Aunt Toinette,” as he called her), as the greatest influence on his childhood, and later, as a young man, Tolstoy wrote some of his most-touching letters to her. Despite the constant presence of death, Tolstoy remembered his childhood in idyllic terms. His first published work, Detstvo (1852; Childhood), was a fictionalized and nostalgic account of his early years.

Educated at home by tutors, Tolstoy enrolled in the University of Kazan in 1844 as a student of Oriental languages. His poor record soon forced him to transfer to the less-demanding law faculty, where he wrote a comparison of the French political philosopher Montesquieu’s The Spirit of Laws and Catherine the Great’s nakaz (instructions for a law code). Interested in literature and ethics, he was drawn to the works of the English novelists Laurence Sterne and Charles Dickens and, especially, to the writings of the French philosopher Jean-Jacques Rousseau; in place of a cross, he wore a medallion with a portrait of Rousseau. But he spent most of his time trying to be comme il faut (socially correct), drinking, gambling, and engaging in debauchery. After leaving the university in 1847 without a degree, Tolstoy returned to Yasnaya Polyana, where he planned to educate himself, to manage his estate, and to improve the lot of his serfs. Despite frequent resolutions to change his ways, he continued his loose life during stays in Tula, Moscow, and St. Petersburg. In 1851 he joined his older brother Nikolay, an army officer, in the Caucasus and then entered the army himself. He took part in campaigns against the native peoples and, soon after, in the Crimean War (1853–56).

In 1847 Tolstoy began keeping a diary, which became his laboratory for experiments in self-analysis and, later, for his fiction. With some interruptions, Tolstoy kept his diaries throughout his life, and he is therefore one of the most copiously documented writers who ever lived. Reflecting the life he was leading, his first diary begins by confiding that he may have contracted a venereal disease. The early diaries record a fascination with rule-making, as Tolstoy composed rules for diverse aspects of social and moral behaviour. They also record the writer’s repeated failure to honour these rules, his attempts to formulate new ones designed to ensure obedience to old ones, and his frequent acts of self-castigation. Tolstoy’s later belief that life is too complex and disordered ever to conform to rules or philosophical systems perhaps derives from these futile attempts at self-regulation.

Concealing his identity, Tolstoy submitted Childhood for publication in Sovremennik (“The Contemporary”), a prominent journal edited by the poet Nikolay Nekrasov. Nekrasov was enthusiastic, and the pseudonymously published work was widely praised. During the next few years Tolstoy published a number of stories based on his experiences in the Caucasus, including “Nabeg” (1853; “The Raid”) and his three sketches about the Siege of Sevastopol during the Crimean War: “Sevastopol v dekabre mesyatse” (“Sevastopol in December”), “Sevastopol v maye” (“Sevastopol in May”), and “Sevastopol v avguste 1855 goda” (“Sevastopol in August”; all published 1855–56). The first sketch, which deals with the courage of simple soldiers, was praised by the tsar. Written in the second person as if it were a tour guide, this story also demonstrates Tolstoy’s keen interest in formal experimentation and his lifelong concern with the morality of observing other people’s suffering. The second sketch includes a lengthy passage of a soldier’s stream of consciousness (one of the early uses of this device) in the instant before he is killed by a bomb. In the story’s famous ending, the author, after commenting that none of his characters are truly heroic, asserts that

Readers ever since have remarked on Tolstoy’s ability to make such “absolute language,” which usually ruins realistic fiction, aesthetically effective.