Looking back at the early modernist manifestoes, such as this one by the Italian futurist Luigi Russolo, The Art of Noise, we see that 'modernism' was one hundred years ago!
Then there was post-modernism.
I'd like to close with a piece by one of the oddest 'modernists', the Anglo-Welsh composer Peter Heseltine, who published his compositions under the name Peter Warlock. As we hear in his Capriol Suite for string orchestra, he was very influenced by Elizabethan and Jacobean music. An antiquarian modernist!