You could always write a PhD thesis on the intersection between noise music, industrialization and politics in the 20th century.
My preferred takeaway is that the unique thing about the 20th century is that “war is hell” became part of the Official Narrative, and not just a thing that the man in the street knew but couldn’t safely talk about. This doesn’t in any way mitigate or excuse any of the horrible things that happened in the 20th century, but I think it is a valid basis for optimism moving forward.