In the years spanning from 1800 to 1824, Ludwig van Beethoven completed nine symphonies, now considered among the greatest masterpieces of Western music. Yet despite the fact that this time period, located in the wake of the Enlightenment and at the peak of romanticism, was one of rich intellectual exploration and social change, the influence of such threads of thought on Beethoven's work has until now remained hidden beneath the surface of the notes...