Lately I've stumbled on the definition utopia as such a lot and therefore as a big classical music listener started to think that utopia is seen as creating a perfect system and is found in literature (Thomas More) and film (Kubrick's 2001), but not so much in music. I suppose Wagner can come to mind in away. What do you think, in what ways does utopia exist in classical musicians works or visions?
Perhaps the works of Alexander Scriabin best embody the Utopian concept, especially The Poem of Ecstasy and Prometheus. Charles Ives also may have had a somewhat Utopian vision.
Vaughan Williams' Sancta Civitas makes direct references to the holy (perfect) city, although as with this avenue of the composer's thought I suppose it's more about glimpsing or traveling towards than actually attaining.
Hindemith's Die Harmonie der Welt.
Late Bruckner.
If it's about creating a perfect system... wouldn't serialism be it?
"Hymunion in Harmondie under Pluramon" is a good one.
Also, some of Nono's later works come to mind (e.g. La Lontananza Nostalgica Utopica Futura).