After some initial studies with composer Rubin Goldmark, Copland traveled to Paris, where he first studied with Isidor Philipp and Paul Vidal, then with noted pedagogue Nadia Boulanger. He studied three years with Boulanger, whose eclectic approach to music inspired his own broad taste. Determined upon his return to the U.S. to make his way as a full-time composer, Copland gave lecture-recitals, wrote works on commission and did some teaching and writing. However, he found that composing orchestral music in the modernist style, which he had adopted while studying abroad, was a financially contradictory approach, particularly in light of the Great Depression. He shifted in the mid-1930s to a more accessible musical style which mirrored the German idea of ("music for use"), music that could serve utilitarian and artistic purposes. During the Depression years, he traveled extensively to Europe, Africa, and Mexico, formed an important friendship with Mexican composer Carlos Chávez and began composing his signature works.