The Spanish Civil War played the most important part in defining Orwell's socialism. He wrote to Cyril Connolly from Barcelona on 8 June 1937: "I have seen wonderful things and at last really believe in Socialism, which I never did before." Having witnessed the success of the anarcho-syndicalist communities, for example in Anarchist Catalonia, and the subsequent brutal suppression of the anarcho-syndicalists, anti-Stalin communist parties and revolutionaries by the Soviet Union-backed Communists, Orwell returned from Catalonia a staunch anti-Stalinist and joined the British Independent Labour Party, his card being issued on 13 June 1938. Although he was never a Trotskyist, he was strongly influenced by the Trotskyist and anarchist critiques of the Soviet regime, and by the anarchists' emphasis on individual freedom. In Part 2 of "The Road to Wigan Pier", published by the Left Book Club, Orwell stated that "a real Socialist is one who wishes—not merely conceives it as desirable, but actively wishes—to see tyranny overthrown". Orwell stated in "Why I Write" (1946): "Every line of serious work that I have written since 1936 has been written, directly or indirectly, against totalitarianism and for democratic socialism, as I understand it." Orwell's conception of socialism was of a planned economy alongside democracy, which was the common notion of socialism in the early and middle 20th century. Orwell's emphasis on "democracy" primarily referred to a strong emphasis on civil liberties within a socialist economy as opposed to majoritarian rule, though he was not necessarily opposed to majority rule. Orwell was a proponent of a federal socialist Europe, a position outlined in his 1947 essay "Toward European Unity," which first appeared in "Partisan Review". According to biographer John Newsinger: