Although musically precocious, Tchaikovsky was educated for a career as a civil servant. There was scant opportunity for a musical career in Russia at that time and no system of public music education. When an opportunity for such an education arose, he entered the nascent Saint Petersburg Conservatory, from which he graduated in 1865. The formal Western-oriented teaching he received there set him apart from composers of the contemporary nationalist movement embodied by the Russian composers of The Five, with whom his professional relationship was mixed. Tchaikovsky's training set him on a path to reconcile what he had learned with the native musical practices to which he had been exposed from childhood. From this reconciliation he forged a personal but unmistakably Russian style—a task that did not prove easy. The principles that governed melody, harmony and other fundamentals of Russian music ran completely counter to those that governed Western European music; this seemed to defeat the potential for using Russian music in large-scale Western composition or for forming a composite style, and it caused personal antipathies that dented Tchaikovsky's self-confidence. Russian culture exhibited a split personality, with its native and adopted elements having drifted apart increasingly since the time of Peter the Great. This resulted in uncertainty among the intelligentsia about the country's national identity—an ambiguity mirrored in Tchaikovsky's career.
Despite his many popular successes, Tchaikovsky's life was punctuated by personal crises and depression. Contributory factors included his early separation from his mother for boarding school followed by his mother's early death, the death of his close friend and colleague Nikolai Rubinstein, and the collapse of the one enduring relationship of his adult life, which was his 13-year association with the wealthy widow Nadezhda von Meck. His homosexuality, which he kept private, has traditionally also been considered a major factor, though some musicologists now downplay its importance. Tchaikovsky's sudden death at the age of 53 is generally ascribed to cholera; there is an ongoing debate as to whether cholera was indeed the cause of death, and whether his death was accidental or self-inflicted.
While his music has remained popular among audiences, critical opinions were initially mixed. Some Russians did not feel it was sufficiently representative of native musical values and expressed suspicion that Europeans accepted the music for its Western elements. In an apparent reinforcement of the latter claim, some Europeans lauded Tchaikovsky for offering music more substantive than base exoticism and said he transcended stereotypes of Russian classical music. Others dismissed Tchaikovsky's music as "lacking in elevated thought," according to longtime New York Times music critic Harold C. Schonberg, and derided its formal workings as deficient because they did not stringently follow Western principles.
Pyotr Ilyich Tchaikovsky was born in Votkinsk, a small town in Vyatka Governorate (present-day Udmurtia) in the Russian Empire, into a family with a long line of military service. His father, Ilya Petrovich Tchaikovsky, had served as a lieutenant colonel and engineer in the Department of Mines, and would manage the Kamsko-Votkinsk Ironworks. His grandfather, Pyotr Fedorovich Tchaikovsky (né Petro Fedorovych Chaika), served first as a physician's assistant in the army and later as city governor of Glazov in Vyatka. His great-grandfather, a Ukrainian Cossack named Fyodor Chaika (accordingly, 'Tchaikovsky' is the derivative of the Ukrainian family name 'Chaika' - 'seagull' in Ukrainian), distinguished himself under Peter the Great at the Battle of Poltava in 1709. Tchaikovsky's mother, Alexandra Andreyevna (née d'Assier), was the second of Ilya's three wives, 18 years her husband's junior and French on her father's side. Both Ilya and Alexandra were trained in the arts, including music—a necessity as a posting to a remote area of Russia also meant a need for entertainment, whether in private or at social gatherings. Of his six siblings, Tchaikovsky was close to his sister Alexandra and twin brothers Anatoly and Modest. Alexandra's marriage to Lev Davydov would produce seven children and lend Tchaikovsky the only real family life he would know as an adult, especially during his years of wandering. One of those children, Vladimir Davydov, whom the composer would nickname 'Bob', would become very close to him.
In 1844, the family hired Fanny Dürbach, a 22-year-old French governess. Four-and-a-half-year-old Tchaikovsky was initially thought too young to study alongside his older brother Nikolai and a niece of the family. His insistence convinced Dürbach otherwise. By the age of six, he had become fluent in French and German. Tchaikovsky also became attached to the young woman; her affection for him was reportedly a counter to his mother's coldness and emotional distance from him, though others assert that the mother doted on her son. Dürbach saved much of Tchaikovsky's work from this period, including his earliest known compositions, and became a source of several childhood anecdotes.