The introduction of a new kind of music must be shunned as imperiling the
whole state, for styles of music are never disturbed without affecting
the most important political institutions. ... The new style, gradually
gaining a lodgement, quitely insinuates itself into manners and customs,
and from it ... goes on to attack laws and constitutions, displaying the
utmost impudence, until it ends by overturning everything.
-- Plato, "Republic", 370 B.C.