( Rossum's Universal Robots ) ( 1921 ) – the play that introduced the word robot to the world – were organic artificial humans, the word " robot " has come to primarily refer to mechanical humans, animals, and other beings.

* 1921 – Robert Cliche, Canadian politician and magistrate ( d. 1978 )

* 1921 – Black Friday: mine owners announce more wage and price cuts, leading to the threat of a strike all across England.

* 1921 – Tove Maës, Danish actress ( d. 2011 )

* 1921 – The British install the son of Sharif Hussein bin Ali ( leader of the Arab Revolt of 1916 against the Ottoman Empire ) as King Faisal I of Iraq.

* 1921 – Georg Alexander, Duke of Mecklenburg ( d. 1996 )

* 1921 – Leo Penn, American director ( d. 1998 )

* 1921 – Ernest Angley, American evangelist and broadcaster

* 1921 – J. James Exon, American politician ( d. 2005 )

They won the first eight matches in succession including a 5 – 0 whitewash in 1920 – 1921 at the hands of Warwick Armstrong's team.

* 2008 – Jake Warren, Canadian diplomat ( b. 1921 )

* 2012 – N. K. P. Salve, Indian politician ( b. 1921 )

The most important Canadian theorist was an American immigrant, Henry Wise Wood, president of the United Farmers of Alberta ( UFA ) during that movement's time as the governing party of the province ( 1921 – 1935 ).

* 1921 – Jack Kramer, American tennis player ( d. 2009 )

* 1921 – Major League Baseball Commissioner Kenesaw Mountain Landis confirms the ban of the eight Chicago Black Sox, the day after they were acquitted by a Chicago court.

* 1921 – Marilyn Maxwell, American actress ( d. 1972 )

* 1921 – Richard Adler, American songwriter and composer ( d. 2012 )

* 1921 – Hayden Carruth, American poet and critic ( d. 2008 )

* 1999 – Byron Farwell, American historian ( b. 1921 )

The second generation was led by Fernand Braudel ( 1902 – 1985 ) and included Georges Duby ( 1919 – 1996 ), Pierre Goubert ( 1915 – 2012 ), Robert Mandrou ( 1921 – 1984 ), Pierre Chaunu ( 1923 – 2009 ), Jacques Le Goff ( 1924 – ) and Ernest Labrousse ( 1895 – 1988 ).

* Nelson Riddle ( 1921 – 1985 ), musician and arranger for various artists such as Frank Sinatra and Ella Fitzgerald.

* Nelson Riddle ( 1921 – 85 ), arranger and composer.

* Nelson Riddle ( 1921 – 85 ), arranger and conductor.

* Nelson Riddle ( 1921 – 1985 ), musician / composer

* A 1921 silent German film Lady Hamilton directed by Richard Oswald with Liane Haid as Hamilton and Conrad Veidt as Nelson

On July 4, 1921, at the age of twelve, Nelson was arrested after accidentally shooting a fellow child in the jaw with a pistol he had found.

Nelson Smock Riddle, Jr. ( June 1, 1921 – October 6, 1985 ) was an American arranger, composer, bandleader and orchestrator whose career stretched from the late 1940s to the mid 1980s.

New league members in D3N are: Accrington Stanley ( 1921 – 1961 ), Ashington ( 1921 – 1929 ), Barrow ( 1921 – 1972 ), Chesterfield, Crewe Alexandra, Darlington, Durham City ( 1921 – 1928 ), Halifax Town, Hartlepool United, Lincoln City, Nelson ( 1921 – 1931 ), Rochdale, Southport ( 1921 – 1978 ), Stalybridge ( 1921 – 1923 ), Tranmere Rovers, Walsall, Wigan Borough ( 1921 – 1931 ) and Wrexham.

In 1921, Nelson attempted to molest a 12-year-old girl named Mary Summers but he was thwarted when she screamed and brought attention to Nelson.

In March 1921, Halifax Town were elected to the Football League, and along with clubs such as Accrington Stanley, Ashington, Durham City and Nelson, became founder members of the newly formed Division Three North.

He went on to ride for noted owners such as Harry F. Sinclair, and Samuel D. Riddle and was the leading money-winning jockey in the United States in 1921, 1923, and again in 1927.

* 1921 – William Asher, American director, screenwriter, and producer ( d. 2012 )

* 1921 – Webb Pierce, American singer-songwriter and guitarist ( d. 1991 )

* 1921 – Esther Williams, American actress and swimmer

* 1843 – C. I. Scofield, American theologian, minister, and writer ( d. 1921 )

* 1921 – Gene Roddenberry, American screenwriter and producer ( d. 1991 )

* Ajax Records ( Quebec ) ( 1921 – 1926 ), a North American record company

* 1921 – Kenneth Arrow, American economist, Nobel Prize laureate

* 1921 – Nancy Kulp, American actress ( d. 1991 )

* 1921 – Thomas Schelling, American economist, Nobel laureate

* 1921 – Alex Haley, American historian ( d. 1992 )

* 1921 – Anna Lee Aldred, American jockey, first female to be a licensed jockey ( d. 2006 )

* 1921 – Herb Ellis, American guitarist ( d. 2010 )

* 2002 – John Agar, American actor ( b. 1921 )

In 1920 the Advertiser was merged with The Boston Record, initially the combined newspaper was called the Boston Advertiser however when the combined newspaper became an illustrated tabloid in 1921 it was renamed The Boston American.

*" Piracy Suspected In Disappearance Of 3 American Ships ", The New York Times, June 21, 1921.

* The Cambridge History of English and American Literature, Volume I Ch. 6. 5: De Consolatione Philosophiae, 1907 – 1921.