We by Yevgeny Zamyatin. This was finished in 1921, so very early on in the Soviet experiment. If you read 1984, you have to read this, by someone who really experienced it. It inspired: Aldous Huxley's Brave New World, Ayn Rand's Anthem, George Orwell's 1884, Kurt Vonnegut's Player Piano. and Ursula K. Le Guin's The Dispossessed (1974, among others.
The Iron Heel by Jack London. Even though he mixes up some thing, this 1908 novel seems to predict World War I Stalin, and Hitler.
I had to read most of these titles in a Sci-Fi class at Georgia Tech in the mid 80's, the theme of which was "dystopias"...
Le Guin is, as is Atwood, a rabid lefty and something of an America hater. Her books are GARBAGE! People can change sex on a whim? GIVE ME A BREAK!