Anarchism has historically gained more support and influence in Spain than anywhere else, especially before Francisco Franco's victory in the Spanish Civil War of 1936–1939.

There were several variants of anarchism in Spain: expropriative anarchism in the period leading up to the conflict, the peasant anarchism in the countryside of Andalusia; urban anarcho-syndicalism in Catalonia, particularly its capital Barcelona; and what is sometimes called "pure" anarchism^{[clarification needed]} in other cities such as Zaragoza. However, these were complementary trajectories, and shared a great deal of ideological similarities.

Early on, the success of the anarchist movement was sporadic. Anarchists would organize a strike and ranks would swell. Usually, repression by police reduced the numbers again, but at the same time further radicalized many strikers.^{[citation needed]} This cycle helped lead to an era of mutual violence at the beginning of the 20th century, in which armed anarchists and pistoleros, armed men paid by company owners, were both responsible for political assassinations.^{[citation needed]}

Spain (ⁱ/ˈspeɪn/ SPAYN; Spanish: España, pronounced: [esˈpaɲa] ( listen)), officially the Kingdom of Spain (Spanish: Reino de España), is a sovereign state and a member of the European Union located in southwestern Europe on the Iberian Peninsula. Its mainland is bordered to the south and east by the Mediterranean Sea except for a small land boundary with the British Overseas Territory of Gibraltar; to the north and north east by France, Andorra, and the Bay of Biscay; and to the northwest and west by the Atlantic Ocean and Portugal.

Spanish territory also includes the Balearic Islands in the Mediterranean, the Canary Islands in the Atlantic Ocean off the African coast, and two autonomous cities in North Africa, Ceuta and Melilla, that border Morocco. Furthermore, the town of Llívia is a Spanish exclave situated inside French territory. With an area of 504,030 square kilometres (194,610 sq mi), it is the second largest country in Western Europe and the European Union after France, and the fourth largest country in Europe after Russia, Ukraine and France.

The Spanish Civil War was a major conflict fought in Spain from 17 July 1936 to 1 April 1939. The war began after a pronunciamiento (declaration of opposition) by a group of generals under the leadership of José Sanjurjo against the elected government of the Second Spanish Republic, at the time under the leadership of President Manuel Azaña. The rebel coup was supported by a number of conservative groups including the Spanish Confederation of the Autonomous Right, monarchists such as the religious conservative Carlists, and the Fascist Falange. The uprising was authoritarian and anti-separatist in inspiration; anti-Basque and anti-Catalan feeling marked the Nationalist zone.

Following the only partially successful coup, Spain was left militarily and politically divided. From that moment onwards, general Francisco Franco began a protracted war of attrition against the established government for the control of the country. The rebel forces received the support of Nazi Germany and the Kingdom of Italy, as well as neighbouring Portugal, while the Soviet Union and Mexico intervened in support of the Republican government or loyalist side.

Avram Noam Chomsky (/ˈnoʊm ˈtʃɒmski/; born December 7, 1928) is an American linguist, philosopher,cognitive scientist, historian, and activist. He is an Institute Professor and Professor (Emeritus) in the Department of Linguistics & Philosophy at MIT, where he has worked for over 50 years. Chomsky has been described as the "father of modern linguistics" and a major figure of analytic philosophy. His work has influenced fields such as computer science, mathematics, and psychology.

Ideologically identifying with anarcho-syndicalism and libertarian socialism, Chomsky is known for his critiques of U.S. foreign policy and contemporary capitalism, and he has been described as a prominent cultural figure. His media criticism has included Manufacturing Consent: The Political Economy of the Mass Media (1988), co-written with Edward S. Herman, an analysis articulating the propaganda model theory for examining the media.

According to the Arts and Humanities Citation Index in 1992, Chomsky was cited as a source more often than any other living scholar from 1980 to 1992, and was the eighth most cited source overall. Chomsky is the author of over 100 books. He is credited as the creator or co-creator of the Chomsky hierarchy, the universal grammar theory, and the Chomsky–Schützenberger theorem.

Ethel MacDonald (24 February 1909—1 December 1960) was a Glasgow-based Scottish anarchist and activist and, in 1937, during the Spanish Civil War, a propagandist on Barcelona Loyalist radio.

A native of North Lanarkshire, Ethel MacDonald, the fifth of nine children, left home at sixteen, joined the Independent Labour Party (ILP) and worked at various jobs. In 1925 she met Guy Aldred and, with him, became politically active in the Anti-Parliamentary Communist Federation (APCF). In 1933 she accepted his invitation to work as his secretary, and joined him in the June 1934 formation of the United Socialist Movement (USM).

In November 1936 MacDonald travelled to Barcelona with Guy Aldred's partner, Jenny Patrick, to represent and show the support of the Scottish anarchist movement for the Republican (Loyalist) side in the Spanish Civil War. In January 1937 she began to transmit regular English-language reports on the war on Barcelona's widely-heard Anarchist radio station run by the Confederacion Nacional del Trabajo (CNT) [National Workers Confederation]. In the crackdown following the events of May 1937 she assisted the escape of anarchists wanted by the Communist secret police and smuggled into prison letters and food for fellow anarchists held by regional authorities. Through her activities in helping anarchists escape Spain, she became renowned in the British press as the "Scots Scarlet Pimpernel". Between July and November 1937, she was a national figure in the newspapers, with daily reports and inquiries as to her whereabouts and activities. Eventually she herself was arrested by a faction of the Loyalist forces, but later released. She returned to Glasgow that November, following speaking engagements in France and Amsterdam.