What effect did world war 1 have on artist' approach to their work?

The First World War was one of the greatest, if not the greatest trauma that humanity experienced. This also reflected on art as well as on other aspects of life. One thing that has always been changed is the traditional concept of art. The senses of the people who passed through the war were helplessness and disorientation, the illusions were broken, so the term "lost generation" came to be. The artists began to describe the struggle, chaos, debris of the world, rather than the beauty of the world. They described topics in which, for example, technologies and inventions contributed to destruction rather than helping humanity. Under such circumstances, surrealism and expressionism are created, in which, primarily in surrealism, cynicism, dark feelings and black humor, backlash against the upper class were characteristic.

i think its the outcome of people's preferences.

lincoln declared that slavery should not be allowed to spread into the new states, and of course this angered the south at the time.