Final answer:
World War I was a modern war that brought death on an unprecedented scale and became a total war involving all aspects of society. Its devastation had far-reaching consequences.
Step-by-step explanation:
World War I was a truly modern war where new weaponry such as tanks, airplanes, machine guns, and poison gas brought death on a scale never seen before in warfare. The massive destruction and loss of life affected not only the soldiers on the battlefield but also civilians, as the war became a total war involving every level of society and all available resources. The war's unprecedented devastation and the failure to resolve the issues that caused it had profound consequences on Europe and the world.