Beethoven's importance in music has been principally defined by the revolutionary nature of his compositions. He freed music from hitherto prevailing conventions of harmony and structure.
Beethoven was a deeply political man in the broadest sense of the word. He was not interested in daily politics, but concerned with questions of moral behaviour and the larger questions of right and wrong affecting the entire society.
It's funny, because in 1970 I met the Beatles quite by a chance at a party. It was the Beethoven bicentenary, and I was then also playing the Beethoven Sonatas. And that's all they wanted to hear about - I wanted to talk about them, and all they wanted to talk about was Beethoven.