Final answer:
World War I earned the title 'Great War' for being the first global conflict with revolutionary industrialized warfare that had extensive and lasting impacts on nations and civilians, transforming politics, society, and culture.
Step-by-step explanation:
World War I, often referred to as the Great War, was unprecedented in its scope and impact. There are several reasons this conflict earned its title, the main answer being its scale and the introduction of modern warfare. First, it was considered the first global conflict due to its vast reach, involving nations across the world and being fought on multiple fronts. This war saw the deployment of new lethal technologies, marking the advent of industrialized warfare. The main explanation, in more than 100 words, is that the Great War introduced tanks, airplanes, machine guns, and chemical weapons, transforming how battles were fought and experienced.The war also had a profound effect on the average citizen; entire nations mobilized, with civilians facing conscription, shortages, and the constant threat of bombings. Additionally, the war's legacy paved the way for future conflicts. It reshaped national boundaries, influenced literature and art, and contributed to the rise of nationalist sentiments that would later fuel World War II. Clearly, the Great War's impact was as extensive as it was devastating.In conclusion, World War I earned the moniker of the Great War due to its global scale, the transformative nature of combat, and its lasting effects on politics, society, and culture.