Does Ruins Literature only refer to the post-World War I, not the post-World War II?
Window in Jinzhong reminds you that in the early years after the end of World War II, some writers in West Germany published literary works describing the rubble and psychological trauma left by the war disaster. For example, Ash's poem Inventory and Boucher's radio drama Outside the Door are all called "destroyed literature".
So, after World War II.