Marcus Aurelius Antoninus was born in AD 121, in the reign of the emperor Hadrian. At first he was called Marcus Annius Verus, but his well-born father died young and he was adopted, first by his grandfather, who had him educated by a number of excellent tutors, and then, when he was sixteen, by Aurelius Antoninus, his uncle by marriage, who had been adopted as Hadrian's heir, and had no surviving sons of his own. Aurelius Antoninus changed Marcus' name to his own and betrothed him to his daughter, Faustina. She bore fourteen children, but none of the sons survived Marcus except the worthless Commodus, who eventually succeeded Marcus as emperor.

On the death of Antoninus in 161, Marcus made Lucius Verus, another adopted son of his uncle, his colleague in government. There were thus two emperors ruling jointly for the first time in Roman history. The Empire then entered a period troubled by natural disasters, famine, plague and floods, and by invasions of barbarians. In 168, one year before the death of Verus left him in sole command, Marcus went to join his legions on the Danube.

Apart from a brief visit to Asia to crush the revolt of Avidius Cassius, whose followers he treated with clemency, Marcus stayed in the Danube region and consoled his somewhat melancholy life there by writing a series of reflections which he called simply To Himself. These are now known as his Meditations, and they reveal a mind of great humanity and natural humility, formed in the Stoic tradition, which has long been admired in the Christian world. He died, of an infectious disease, perhaps, in camp on 17 March AD 180.

Virginia Woolf was born in London in 1882. After her father's death in 1904 Virginia and her sister, the painter Vanessa Bell, moved to Bloomsbury and became the centre of ‘The Bloomsbury Group’. This informal collective of artists and writers exerted a powerful influence over early twentieth-century British culture.

In 1912 Virginia married Leonard Woolf, a writer and social reformer. Three years later, her first novel The Voyage Out was published, followed by Night and Day (1919) and Jacob's Room (1922). Between 1925 and 1931 Virginia Woolf produced what are now regarded as her finest masterpieces, from Mrs Dalloway (1925) to The Waves (1931).

She also maintained an astonishing output of literary criticism, short fiction, journalism and biography. On 28 March 1941, a few months before the publication of her final novel, Between the Acts, Virginia Woolf committed suicide.

Kate Chopin was born in St Louis, Missouri on 8 Feb 1850. Born Katherine O'Flaherty, she grew up in a predominantly female household after her father died when she was just four years old. Her father was an Irish immigrant, and her mother was French Creole.

In 1870 she married Oscar Chopin, a local cotton trader, and together they had six children. In 1882 Oscar died from swamp fever, leaving Kate a widow with a large family to support, and the heir to his sizeable debts. She turned to writing in order to support her young family, publishing her first short story in 1889. A number of her works were subsequently published in literary magazines and popular American periodicals, including Vogue.

Chopin published only two novels in her lifetime: At Fault and The Awakening. The Awakening, published in 1899, was largely condemned as vulgar and immoral by critics of the time. Dismayed by such a harsh reception, Chopin cut short her brief career as a novelist, and for the remainder of her life focused solely on writing short stories, poetry and reviews. Kate Chopin died on 22 August 1904 from a brain haemorrhage.

Kate O'Flaherty was born on February 8, 1850, in St. Louis, of French and Irish ancestry. She was graduated from the St. Louis Academy of the Sacred Heart in 1868; two years later she married Oscar Chopin and went to live with him in New Orleans. They had five sons by 1878, and the following year they moved to Cloutierville, a tiny French village in Natchitoches Parish, in northwest Louisiana. There their last child and only daughter was born in 1879.

After Oscar's death in 1882, his widow ran their plantations and carried on a notorious romance with a married neighbour, but abruptly chose to return to St. Louis in 1884. Within five years she had begun her literary career, and during the next decade she published two novels - At Fault (1890) and The Awakening (1899) - and nearly a hundred short stories, poems, essays, plays and reviews.

Two volumes of short stories mostly set in the Cane River country of Louisiana, Bayou Folk (1894) and A Night in Acadie (1897) were acclaimed during her lifetime. But The Awakening, the story of a woman who has desires that marriage cannot fulfil, was widely condemned, and Chopin's publisher cancelled her third short-story collection, A Vocation and a Voice. Chopin died on August 22 1904.

Nathaniel Hawthorne was born in Salem, Massachusetts, where he wrote the bulk of his masterful tales of American colonial history.

His career as a novelist began with The Scarlet Letter (1850) and also includes The house of the Seven Gables, The Blithedale Romance, and The Marble Faun.

Plato ranks among the most familiar ancient philosophers, along with his teacher, Socrates, and his student, Aristotle.

In addition to writing philosophical dialogues - used to teach logic, ethics, rhetoric, religion, and mathematics as well as philosophy - he founded Athens' Academy, the Western world's first institution of higher learning.

Ralph Waldo Emerson (May 25, 1803-April 27, 1882) was a famous lecturer, philosopher, poet, and writer. He led the transcendentalist movement of the 1800s, mentored Henry David Thoreau, and was a pioneer of multiculturalism in American writing.