One question one might ask is, 100 years or more later, when the specific political context of the work is no longer relevant, is it still convincing? Inspiring? Thought provoking? We see political themes in visual art and literature all the time, including in works that are many centuries old. In most of those works, most of us would have to do some historical research even just to learn what the political context and message was. Dante's Divine Comedy is a good example. What about the operas of Shostakovich, The Nose and Lady Macbeth? Or Arlo Guthrie's Alice's Restaurant, with it's anti-Vietnam War message? Don't they have something to them that goes beyond their specific political context?I wasn't thinking of abstract works but more likely operas or other works with a text or narrative program. However, knowing a composer's politics, a title can be enough to cause the work to be an overt political statement.