An excellent list of essential works. Dystopian fiction is vitally important, more so now than ever before.
From an article I wrote on the subject: "Dystopian science fiction serves a vital function in society. It causes us to stop and question draconian, ill-thought-through, authoritarian social, economic, technological, political, sexual, or religious ideology, by finding comparative points in literature and heeding their warnings. In dystopian fiction, authors try to imagine worst-case scenarios, and in turn, lobbyists try to prevent them from ever coming to pass."