Symphonic poem Tchaikovsky's work as "Isle of the Dead" (1909) does its independence from it. A similar debt to his teacher Rimsky-Korsakov imbues Igor Stravinsky's "The Song of the Nightingale", excerpted from his opera "The Nightingale". Alexander Scriabin's "The Poem of Ecstasy" (1905–08) and "" (1908–10), in their projection of an egocentric theosophic world unequalled in other symphonic poems, are notable for their detail and advanced harmonic idiom. Socialist realism in the Soviet Union allowed program music to survive longer there than in western Europe, as typified by Dmitri Shostakovich's symphonic poem "October" (1967). While France was less concerned than other countries
Symphonic poem this pattern, of which "Les Préludes" is one of the best-known examples. The second practice was thematic transformation, a type of variation in which one theme is changed, not into a related or subsidiary theme but into something new, separate and independent. As musicologist Hugh Macdonald wrote of Liszt's works in this genre, the intent was "to display the traditional logic of symphonic thought;" that is, to display a comparable complexity in the interplay of musical themes and tonal 'landscape' to those of the Romantic symphony. Thematic transformation, like cyclic form, was nothing new in itself. It had been previously