Introduction. The World War, also known as the Great War, was a global conflict that began and ended. This involved many world powers and caused significant changes on a global scale. Causes of World War I, an international conflict that affected most of Europe, as well as Russia, the United States, the Middle East, and other regions. This led to the fall of four major imperial dynasties and, in Ww, its effects on the world. World War I World War I occurred and shaped what we call the modern world. It had lasting impacts, still visible on a daily basis, but it mainly affected the social and political spheres. It was between Germany, Austria-Hungary and Bulgaria as well as,