Literary modernism, or modernist literature, has its origins in the late 19th and early 20th centuries, mainly in Europe and North America, and is characterized by a very self-conscious break with traditional ways of writing, in both poetry and prose fiction. Modernists experimented with literary form and expression, as exemplified by Ezra Pound's maxim to "Make it new." This literary movement was driven by a conscious desire to overturn traditional modes of representation and express the new sensibilities of their time. The horrors of the First World War saw the prevailing assumptions about society reassessed.