Final answer:
World War I was the first global war in history, resulting in significant impact on the average citizen and setting the stage for future conflicts.
Step-by-step explanation:
World War I, also known as the Great War, was the first global war in history. It lasted from 1914 to 1918 and involved nations from multiple continents. The war had a significant impact on the average citizen, as it brought enormous destruction and devastation, changed national boundaries, and affected daily life in unprecedented ways. It was a total war fought with new and deadly weapons, such as tanks, airplanes, and poison gas. The war failed to resolve the issues that caused it, and it set the stage for future conflicts.