The historical context of World War I and the subsequent Roaring Twenties significantly shaped Ernest Hemingway's writings. As a soldier and an ambulance driver during the war, Hemingway experienced the harsh realities of combat, which influenced his themes of trauma, loss, and male identity. The disillusionment following the war is evident in works like "The Sun Also Rises," where characters grapple with the spiritual emptiness of post-war society. Additionally, Hemingway's concise writing style reflects the modernist movement of the time, emphasizing the importance of subtext and the complexities of human experience.