Arkhaven has a three-part series on the rise and fall of Disney (or more accurately, the rises and falls).
I don’t 100% agree with all the assumptions or conclusions of the writer. I find myself more in agreement with Sam Lively’s Trojan Mouse assessment, though I have caveats even about that. But both Lively’s book and the article series can serve to give you a rounded gloss of Disney’s history both in terms of animation production, and ideology. On matters of inference, ideology, and artistic integrity there is room for some debate; on matters of fact, both resources are quite good.
Anyway, I’m not here to push my own quibbles with the assessments. Merely to note them as resources.
Perhaps I will write up my own thoughts at some future point.