Editing Aaron Copland (section)

=== 1935 to 1950 ===
{{listen|type=music|image=none|help=no
| filename     = Aaron Copland Appalachian Spring Opening original version for 13 instruments.ogg
| title        = Opening: ''Appalachian Spring'', original version for 13 instruments
| description  = Sample of the opening movement in Copland's ballet}}

Around 1935 Copland began to compose musical pieces for young audiences, in accordance with the first goal of American Gebrauchsmusik.{{sfn|Pollack|1999|p=303}} These works included piano pieces (''The Young Pioneers'') and an opera (''[[The Second Hurricane]]'').{{sfn|Pollack|1999|pp=303–05}} During the Depression years, Copland traveled extensively to Europe, Africa, and Mexico. He formed an important friendship with Mexican composer [[Carlos Chávez]] and returned often to Mexico for working vacations conducting engagements.{{sfn|Pollack|1999|pp=178, 226}} During his initial visit to Mexico, Copland began composing the first of his signature works, ''[[El Salón México]]'', completed in 1936. In it and in ''The Second Hurricane'' Copland began "experimenting", as he phrased it, with a simpler, more accessible style.{{sfn|Copland|Perlis|1984|p=245}} This and other incidental commissions fulfilled the second goal of American Gebrauchsmusik, creating music of wide appeal.

[[File:Carlos Chavez.jpg|thumb|Carlos Chávez in 1937]]
Concurrent with ''The Second Hurricane'', Copland composed (for radio broadcast) "Prairie Journal" on a commission from the [[Columbia Broadcast System]].{{Sfn|Pollack|1999|p=310}} This was one of his first pieces to convey the landscape of the American West.{{sfn|Pollack|1999|p=312}} This emphasis on the frontier carried over to his ballet ''[[Billy the Kid (ballet)|Billy the Kid]]'' (1938), which along with ''El Salón México'' became his first widespread public success.{{sfn|Smith|1953|p=187}}{{sfn|Pollack|1999|p=323}} Copland's ballet music established him as an authentic composer of American music much as Stravinsky's ballet scores connected the composer with Russian music and came at an opportune time.{{sfn|Smith|1953|p=184}} He helped fill a vacuum for American choreographers to fill their dance repertory{{sfn|Smith|1953|p=185}} and tapped into an artistic groundswell, from the motion pictures of [[Busby Berkeley]] and [[Fred Astaire]] to the ballets of [[George Balanchine]] and [[Martha Graham]], to both democratize and Americanize dance as an art form.{{sfn|Oja|Tick|2005|p=94}} In 1938, Copland helped form the [[American Composers Alliance]] to promote and publish American contemporary classical music. He was president of the organization from 1939 to 1945.<ref name="nyclgbtsites.org"/> In 1939, Copland completed his first two Hollywood film scores, for ''[[Of Mice and Men (1939 film)|Of Mice and Men]]'' and ''[[Our Town (1940 film)|Our Town]]'', and composed the radio score "John Henry", based on [[John Henry (folklore)|the folk ballad]].{{sfn|Smith|1953|p=169}}

While these works and others like them that followed were accepted by the listening public at large, detractors accused Copland of pandering to the masses.{{sfn|Oja|Tick|2005|pp=308, 336}} Music critic [[Paul Rosenfeld]], for one, warned in 1939 that Copland was "standing in the fork in the high road, the two branches of which lead respectively to popular and artistic success".{{sfn|Oja|Tick|2005|p=338}} Even some of Copland's friends, such as composer [[Arthur Berger (composer)|Arthur Berger]], were confused about Copland's simpler style.{{sfn|Oja|Tick|2005|p=336}} One, composer [[David Diamond (composer)|David Diamond]], went so far as to lecture Copland: "By having sold out to the mongrel commercialists half-way already, the danger is going to be wider for you, and I beg you dear Aaron, don't sell out [entirely] yet."{{sfn|Pollack|1999|p=190}} Copland's response was that his writing as he did and in as many genres was his response to how the Depression had affected society, as well as to new media and the audiences made available by these new media.{{sfn|Oja|Tick|2005|pp=308–09}} As he put it, "The composer who is frightened of losing his artistic integrity through contact with a mass audience is no longer aware of the meaning of the word art."{{sfn|Oja|Tick|2005|p=338}}

[[File:Aaron Copland, Fanfare for the Common Man.jpg|thumb|left|Initial trumpet notes from ''Fanfare for the Common Man'', Tanglewood]]
The 1940s were arguably Copland's most productive years, and some of his works from this period cemented his fame. His ballet scores for ''[[Rodeo (Copland)|Rodeo]]'' (1942) and ''[[Appalachian Spring]]'' (1944) were huge successes. ''[[Lincoln Portrait]]'' and ''[[Fanfare for the Common Man]]'' became patriotic standards. Also important was the [[Symphony No. 3 (Copland)|Third Symphony]]. Composed from 1944 to 1946, it became Copland's best-known symphony.{{sfn|Pollack|1999|pp=410, 418}} The [[Clarinet Concerto (Copland)|Clarinet Concerto]] (1948), scored for solo clarinet, strings, harp, and piano, was a commission piece for band-leader and clarinetist Benny Goodman and a complement to Copland's earlier jazz-influenced work, the [[Piano Concerto (Copland)|Piano Concerto]] (1926).{{sfn|Pollack|1999|p=424}} His ''Four Piano Blues'' is an introspective composition with a jazz influence.{{sfn|Pollack|1999|p=427}} Copland finished the 1940s with two film scores, one for [[William Wyler]]'s ''[[The Heiress]]'' and one for the [[The Red Pony (1949 film)|film adaptation]] of [[John Steinbeck]]'s novel ''[[The Red Pony]]''.{{sfn|Smith|1953|p=202}}

In 1949, Copland returned to Europe, where he found French composer Pierre Boulez dominating the group of postwar avant-garde composers there.{{sfn|Pollack|1999|p=460}} He also met with proponents of twelve-tone technique, based on the works of Arnold Schoenberg, and found himself interested in adapting serial methods to his own musical voice.