How did world war 1 act as a turning point in world history?

World War I marked a significant turning point in world history by reshaping political boundaries, leading to the collapse of empires such as the Austro-Hungarian, Ottoman, Russian, and German Empires. It catalyzed widespread social changes, including the rise of movements for women's rights and labor reforms. The war's aftermath also set the stage for World War II through unresolved grievances and the punitive measures of the Treaty of Versailles. Lastly, it ushered in a new era of technological warfare and geopolitical tension that defined the 20th century.