structural:summarization, stylistic:tone, structural:scholar_edition
Early life and education

Shelley was born on 4 August 1792 at Field Place, Warnham, Sussex, England. He was the eldest son of Sir Timothy Shelley, 2nd Baronet of Castle Goring (1753–1844), a Whig Member of Parliament for Horsham from 1790 to 1792 and for Shoreham between 1806 and 1812, and his wife, Elizabeth Pilfold (1763–1846), the daughter of a successful butcher. He had four younger sisters and one much younger brother. Shelley's early childhood was sheltered and mostly happy. He was particularly close to his sisters and his mother, who encouraged him to hunt, fish and ride. At age six, he was sent to a day school run by the vicar of Warnham church, where he displayed an impressive memory and gift for languages.

In 1802 he entered the Syon House Academy of Brentford, Middlesex, where his cousin Thomas Medwin was a pupil. Shelley was bullied and unhappy at the school and sometimes responded with violent rage. He also began suffering from the nightmares, hallucinations and sleep walking that were to periodically affect him throughout his life. Shelley developed an interest in science which supplemented his voracious reading of tales of mystery, romance and the supernatural. During his holidays at Field Place, his sisters were often terrified at being subjected to his experiments with gunpowder, acids and electricity. Back at school he blew up a paling fence with gunpowder.

In 1804, Shelley entered Eton College, a period which he later recalled with loathing. He was subjected to particularly severe mob bullying which the perpetrators called "Shelley-baits". A number of biographers and contemporaries have attributed the bullying to Shelley's aloofness, nonconformity and refusal to take part in fagging. His peculiarities and violent rages earned him the nickname "Mad Shelley". His interest in the occult and science continued, and contemporaries describe him giving an electric shock to a master, blowing up a tree stump with gunpowder and attempting to raise spirits with occult rituals. In his senior years, Shelley came under the influence of a part-time teacher, Dr James Lind, who encouraged his interest in the occult and introduced him to liberal and radical authors. Shelley also developed an interest in Plato and idealist philosophy which he pursued in later years through self-study. According to Richard Holmes, Shelley, by his leaving year, had gained a reputation as a classical scholar and a tolerated eccentric.

In his last term at Eton, his first novel Zastrozzi appeared and he had established a following among his fellow pupils. Prior to enrolling for University College, Oxford, in October 1810, Shelley completed Original Poetry by Victor and Cazire (written with his sister Elizabeth), the verse melodrama The Wandering Jew and the gothic novel St. Irvine; or, The Rosicrucian: A Romance (published 1811).

At Oxford Shelley attended few lectures, instead spending long hours reading and conducting scientific experiments in the laboratory he set up in his room. He met a fellow student, Thomas Jefferson Hogg, who became his closest friend. Shelley became increasingly politicised under Hogg's influence, developing strong radical and anti-Christian views. Such views were dangerous in the reactionary political climate prevailing during Britain's war with Napoleonic France, and Shelley's father warned him against Hogg's influence.

In the winter of 1810–1811, Shelley published a series of anonymous political poems and tracts: Posthumous Fragments of Margaret Nicholson, The Necessity of Atheism (written in collaboration with Hogg) and A Poetical Essay on the Existing State of Things. Shelley mailed The Necessity of Atheism to all the bishops and heads of colleges at Oxford, and he was called to appear before the college's fellows, including the Dean, George Rowley. His refusal to answer questions put by college authorities regarding whether or not he authored the pamphlet resulted in his expulsion from Oxford on 25 March 1811, along with Hogg. Hearing of his son's expulsion, Shelley's father threatened to cut all contact with Shelley unless he agreed to return home and study under tutors appointed by him. Shelley's refusal to do so led to a falling-out with his father.