Mary Shelley (née Mary Wollstonecraft Godwin; 30 August 1797 – 1 February 1851) was a British novelist, short story writer, dramatist, essayist, biographer, and travel writer, best known for her Gothic novel Frankenstein: or, The Modern Prometheus (1818). She also edited and promoted the works of her husband, the Romantic poet and philosopher Percy Bysshe Shelley. Her father was the political philosopher William Godwin, and her mother was the philosopher and feminist Mary Wollstonecraft.
After Mary Godwin's mother died giving birth to her, she and her older half-sister, Fanny Imlay, were raised by her father. When Mary was four, Godwin married his neighbour, Mary Jane Clairmont. Godwin provided his daughter with a rich, if informal, education, encouraging her to adhere to his liberal political theories. In 1814, Mary Godwin began a romantic relationship with one of her father’s political followers, the married Percy Bysshe Shelley. Together with Mary's stepsister, Claire Clairmont, they left for France and travelled through Europe; upon their return to England, Mary was pregnant with Percy's child. Over the next two years, she and Percy faced ostracism, constant debt, and the death of their prematurely born daughter. They married in late 1816 after the suicide of Percy Shelley's first wife, Harriet.
In 1816, the couple famously spent a summer with Lord Byron, John William Polidori, and Claire Clairmont near Geneva, Switzerland, where Mary conceived the idea for her novel Frankenstein.
During the rainy summer of 1816, the "Year Without a Summer," the world was locked in a long cold volcanic winter caused by the eruption of Mount Tambora in 1815. Mary Wollstonecraft Godwin, aged 19, and her lover (and later husband) Percy Bysshe Shelley, visited Lord Byron at the Villa Diodati by Lake Geneva in Switzerland. The weather was consistently too cold and dreary that summer to enjoy the outdoor holiday activities they had planned, so the group retired indoors until dawn. Amongst other subjects, the conversation turned to the experiments of the 18th-century natural philosopher and poet Erasmus Darwin, who was said to have animated dead matter, and to galvanism and the feasibility of returning a corpse or assembled body parts to life. Sitting around a log fire at Byron's villa, the company also amused themselves by reading German ghost stories, prompting Byron to suggest they each write their own supernatural tale. Shortly afterwards, in a waking dream, Mary Godwin conceived the idea for Frankenstein.
The title of the novel refers to a scientist, Victor Frankenstein, who learns how to create life and creates a being in the likeness of man, but larger than average and more powerful. In popular culture, people have tended to refer to the Creature as "Frankenstein", despite this being the name of the scientist. Frankenstein is infused with some elements of the Gothic novel and the Romantic movement. It was also a warning against the "over-reaching" of modern man and the Industrial Revolution, alluded to in the novel's subtitle, The Modern Prometheus. The story has had an influence across literature and popular culture and spawned a complete genre of horror stories and films. It is considered the first fully-realized science fiction novel.
The Shelleys left Britain in 1818 for Italy, where their second and third children died before Mary Shelley gave birth to her last and only surviving child, Percy Florence. In 1822, her husband drowned when his sailing boat sank during a storm in the Bay of La Spezia. A year later, Mary Shelley returned to England and from then on devoted herself to the upbringing of her son and a career as a professional author. The last decade of her life was dogged by illness, probably caused by the brain tumour that was to kill her at the age of 53.