( 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 ).

* 2006 – Stanisław Lem, Polish writer ( b. 1921 )

* Stanisław Lem 1921 – 2006 ; writer

In 1921 Stanisław Mańczak bought the porcelain fabric from the Annaburger Steinguttfabrik firm.

During the Polish – Soviet War ( 1919 – 1921 ), some one hundred Russian ciphers were broken by a sizable cadre of Polish cryptologists who included Army Lt. Jan Kowalewski and three world-famous professors of mathematics — Stefan Mazurkiewicz, Wacław Sierpiński and Stanisław Leśniewski.

* Stanisław Lem ( 1921 – 2006 ), Polish science fiction writer

In 1921 Jasieński published one of his first futurist works, Nuż w bżuchu ( Nayf in the Abdomen, with intentionally wrong spelling of title ) and, together with Stanisław Młodożeniec became known as one of the founders of the Polish Futurist movement.

* Stanisław Wróblewski ( 1921 – 26 ),

Stanisław Nagy, SCI ( September 30, 1921 in Bieruń, Silesia, Poland, of a Hungarian father and Polish mother ) is a member of the Priests of the Sacred Heart of Jesus ( Dehonians ) and a Cardinal.

* Stanisław Lem ( 1921 – 2006 ), satirical, philosophical, and science fiction writer

In the company of Lem Harris, another Communist Party agricultural expert, he made a year-long survey of American agriculture, echoing his research of 1921.

* 1921 – August Kowalczyk, Polish actor, director, and Holocaust survivor ( d. 2012 )

Following the end of World War I, the Greater Poland Uprising ( 1918 – 1919 ) ensured that most of the region became part of the newly independent Polish state, forming most of Poznań Voivodeship ( 1921 – 1939 ).

The territories in the east won by 1921 would form the basis for a swap arranged and carried out by the Soviets in 1943-1945, who at that time compensated the reemerging Polish state for its eastern lands lost to the Soviet Union with conquered areas of eastern Germany.

* 1921 – Franciszek Blachnicki, Polish priest ( d. 1987 )

The expulsion concerned the territories " under Polish administration ", i. e. southern East Prussia ( Masuria ), Farther Pomerania, the New March region of the former Province of Brandenburg, the districts of the Grenzmark Posen-West Prussia, Lower Silesia and those parts of Upper Silesia that had remained with Germany after the 1921 Upper Silesia plebiscite.

Following the third Silesian Uprising ( 1921 ), however, the easternmost portion of Upper Silesia ( including Katowice ), with a majority ethnic Polish population, was awarded to Poland, where it was formed into the Silesian Voivodeship.

The Polish – Soviet War was particularly bitter and ended by the Treaty of Riga in 1921.

After First World War the Polish community starting having masses in Polish in Churches of Saint Ann and since 1921 in St. Martin church ; a Polish consulate was opened on the Main Square, and a Polish School was formed by Helena Adamczewska.

* Zbigniew Czajkowski (" Father of the Polish School of fencing ") b. 1921

Following the end of World War I, the Greater Poland Uprising ( 1918 – 1919 ) ensured that most of the region became part of the newly independent Polish state, forming most of Poznań Voivodeship ( 1921 – 1939 ).

In May 1921 the Third Silesian Uprising broke out and Hindenburg was captured by Polish insurgents, who held it until the end of the uprising.

For a short period between 1918 and 1921 Tychy was just inside the border of the newly formed Weimar Republic and still a part of the German Province of Silesia, only securing its place within the Second Polish Republic after the armed Silesian Uprisings ( 1919 to 1921 ).

After the defeat of Imperial Germany in World War I, a plebiscite was held on 20 March 1921 in Oppeln to determine if the city would be in the Weimar Republic or become part of the Second Polish Republic.

Herschel Feibel Grynszpan ( March 28, 1921 — declared dead 1960 ) was a German-born Jewish refugee of Polish parents, and convicted political assassin.

On 11 June 1921, he wrote to the Polish episcopate, warning against political misuses of spiritual power, urging again for peaceful coexistence with neighbouring peoples, stating that “ love of country has its limits in justice and obligations .” He sent nuncio Ratti to Silesia to act against potential political agitations of the Catholic clergy.

On 11 June 1921, Benedict XV asked Ratti to deliver his message to the Polish episcopate, warning against political misuses of spiritual power, urging again peaceful coexistence with neighbouring people, stating that “ love of country has its limits in justice and obligations ”

The city changed hands twice during the Polish-Soviet War and eventually stayed inside Polish borders, a development that was formally recognized by the Treaty of Riga in 1921.

The most important include the land reforms in the Second Polish Republic ( 1919, 1921, 1923, 1925 and 1928 ) and in the People's Republic of Poland ( 1944 ).

The area of the Voblast was part of the Second Polish Republic from 1921 until 1939 largely as the Polesie Voivodeship, when it was joined to the Byelorussian Soviet Socialist Republic.