How did World War I change the world? How did it usher in a new age for diverse societies between 1910–1939?

World War I contributed to major changes in world societies, economies and other aspects of life. The conflict was greater than any previous war in history at the time, involving 28 countries with the highest war mobilization recorded.

The war led to the redrawing of territorial boundaries; old countries fell with new ones taking their place. Monarchies fell, and electoral democracies were established to replace them, leading to direct and indirect political changes in different countries. World War I ushered in the idea of universal suffrage, bringing radical changes in global politics.

The communist revolutionary wave was also attributed to World War I. The continued spread of communism in many European countries changed global relations and led to future conflicts with anti-communist regimes.

World War II and the Holocaust happened as a result of World War I. Germans were generally dissatisfied with the Treaty of Versailles, which forced them to assume complete responsibility for the war and make reparations. This, in turn, created a favorable environment for the rise of Hitler and the Nazi party, who took advantage of the negative sentiments expressed by the community.

The war resulted in the shift of financial bases from Europe to the United States. World War I plunged the participating countries into debt, especially Britain, which was a financial power previously.

World War I also ushered a period of technological advancement. Although this was initially directed at war efforts such as the development of the Atomic bomb and tanks, similar techniques (advanced mass production techniques) were later used in medicine and other progressive ventures.

Socially, the war prepared grounds for the establishment of Israel, Iraq, Syria and Lebanon in the Middle East. Poland, Czechoslovakia and Yugoslavia were also established or re-established in Europe. Diverse societies were offered an opportunity to politically and socially assert themselves in the global sphere. Yugoslavia emerged as a multi-national state. Czechoslovakia was divided among two Slavic nationalities. Albanians merged with Greeks and Serbs while the Turkish people merged with the Bulgari in Bulgaria.