Brave New World warns against the dangers of consumerism, hedonism and complacency.
1984 warns against fascist modes of governance, the dehumanization of individuals under totalitarian regimes.
Animal Farm warns against the danger of revolutionism, and the way ideals can be led astray.
Atlas Shrugged warns against... The way poor people steal from the rich? How rich people are the only productive members of society? How we'd be better off if we just ceded total control of our society to the oligarchy?
Yeah... One of these doesn't belong on the list. I read all four, and while I enjoyed the first three, the last one is closer to fanfiction than literature in my mind. I always think of AnCap memes and chuckle to myself when I see it mentioned.