John Thelwall (27 July 1764 - 17 February 1834) was a radical British orator, writer, political reformer, journalist, poet, elocutionist and speech therapist.
Thelwall was born in Covent Garden, London, but was descended from a Welsh family which had its seat at Plas y Ward, Denbighshire. He was the son of a silk merchant, Joseph Thelwall, who died in 1772 leaving the family in economic distress. It was not until 1777, though, that John had to leave school to help his mother, who had decided to keep the silk business running.
Thelwall's fondness for books showed up at an early age, earning him the scorn of his mother. It also made it impossible for him to fulfill an apprenticeship as a tailor. Young Thelwall also tried to make a living in an attorney office, but his morals and eccentricity made him quit the job and try to depend on his writing as a journalist and editor.
Thelwall also developed a significant interest in medical science and attended lectures at Guy's and St. Thomas hospitals in London; he was friends with Astley Cooper, a renowned surgeon in London. Thelwall's particular interest lay in understanding and participating in topical debates concerning cognition and 'vitality'. Jasmin Solomonescu argues that 'Thelwall's medical training became compounded with his radical politics and developing theories of language and the imagination to provide a model and a lexicon for his vision of reform' (14). In 1793, Thelwall presented a paper at the Physical Society in London in which he debated the subject of 'animal vitality'; the paper was subsequently published as An Essay Towards a Definition of Animal Vitality (1793). Considering the views of several well-known sources, Thelwall proposed that vitality or life was a combination of 'specific organisation' and 'proper stimuli'; blood is the means by which the 'stimuli' is conveyed to different parts of the body: 'I consider the blood independent of its nutritive power, as the specific medium by which the stimuli must be conveyed to the different parts of the organised frame, so as to produce the Vital Action. This Blood in its passage through the Lungs, collects a something, which generates a specific heat....But what is this something, this vivifying principle?...Something that is contained in the atmosphere, something of a powerful and exquisitely subtile nature'. Thelwall's views formed part of a larger debate concerning the relationship between the emerging scientific understandings and traditional views regarding the divine nature of creation.
Thelwall's career as an editor and journalist was quite successful, but the highlight of this period was his political activism. In the wake of the French Revolution, he became "intoxicated in the French doctrines of the day". He started to hold talks in London's radical societies and, having made acquaintance with fellow radical John Horne Tooke, contributed to ground the London Corresponding Society in 1792. In 1794 he, Horne Tooke and Thomas Hardy were tried for treason following lectures protesting the arrest of other political activists. After spending some time at the Tower and at Newgate, the three were acquitted. Government officials who considered him to be the most dangerous man in Britain continued to hound him even after his acquittal. In 1795, after prime minister William Pitt the Younger's Gagging Acts (the Treason Act and Seditious Meetings Act) received Royal Assent, Thelwall's lectures had a shift in theme, from contemporary political comment to the history of Rome to dodge censorship.
Still, loyalists stormed Thelwall's public outings, forcing him to leave London and tour England. During many of the lectures in eastern England angry mobs impeded the hearings and in 1798 Thelwall decided to retire from politics.
Thelwall also wrote poetry and in the second half of the 1790s associated with Romantic poets such as Coleridge and Wordsworth. Coleridge praised Thelwell as "intrepid, eloquent, and honest; perhaps the only acting democrat that is honest". Through his correspondence and meetings with these poets Thelwall would forge a link between the Romantic movement in poetry and radical politics.
His career was very successful, and by 1818 he had earned enough money to buy a journal, The Champion, through which he called for parliamentary reform and in which he "denounced the government's actions in the Peterloo massacre, and voiced scepticism about the Cato Street conspiracy". His volcanic style and political views, though, were not fitting for the middle class public of the journal, which ended up in considerable losses. Thelwall therefore resumed his lecture touring and died in Bath during one of those tours.
In the field of politics Thelwall promoted "democratic reform, universal suffrage and freedom of speech". Steve Poole has argued: "Thelwall's was perhaps the most important individual voice in the history of British radicalism... Nobody was better than Thelwall at communicating the Rights of Man to a wide audience."
In the field of speech therapy, he was the "first to make speech correction a profession" and the first to write a book on the subject and to establish a school.
In October 2009, the Dalhousie University Theatre Department produced the first ever staging of Thelwall's 1801 melodrama The Fairy of the Lake, as a complement to the John Thelwall conference being hosted at the time by the University's English Department.
Thelwall married twice. In 1837 his second wife, Cecil, wrote a biography on the early life of her husband.
Thelwall's eldest son was the clergyman and scholar Algernon Sidney Thelwall and his lesser-known younger son was called John Hampden Thelwall or Hampden Thelwall. Both sons were named after 17th century republicans.