Why is Music So Ideological, and Why Do Totalitarian States Take It So Seriously? A Personal View from History and the Social Sciences.
"That music (even “absolute music”) aptly and effectively conveys ideological attitudes is proven by how often it was, and still is, the frequent object of censorship. The question of why it, possibly more than other arts, has the ability to be ideological has seldom been addressed directly. Nonetheless, work done during more than a century in the social sciences does, at least in part, shed some light on where to look for the mysterious power music has to reflect or challenge social order or, even when not intended to do so, to collect symbolic meaning and functions that easily escape the intentions of its makers. Music as a form of social activity, like other kinds of activity, more or less visibly seeks to include some people and exclude, or even antagonize, others."