Just a curiosity thread. Looking for great novels which have either a direct political theme, or portray issues with obvious intent on expressing political opinion. A quick list of some favorites I have read:

Darkness at Noon, Arthur Koestler
The Ministry of Fear, Graham Greene
The Grapes of Wrath, John Steinbeck
All the King's Men, Robert Penn Warren
The Spy Who Came in from the Cold, John LeCarré
We, Evgeny Zamyatin
Brave New World, Aldous Huxley
1984, George Orwell
Threepenny Novel, Bertolt Brecht
Kaputt, Curzio Malaparte