* Territorial changes: The war resulted in the redrawing of the map of Europe, with the creation of new nation-states such as Poland, Czechoslovakia, and Yugoslavia. The German Empire lost territory to the Allied Powers, and the Austrian-Hungarian Empire collapsed.
* Political changes: The war led to the collapse of the Russian Empire and the rise of communism in Russia. The Ottoman Empire also collapsed, leading to the creation of modern Turkey.
* Economic changes: The war caused widespread economic disruption and damage. The United States emerged from the war as a major economic power.
* Social changes: The war led to increased social upheaval and the rise of women's rights movements. It also led to an increase in nationalism and a decrease in religious affiliation.
* Technological changes: The war saw the development of new technologies, such as the tank, the airplane, and the submarine. These technologies would have a profound impact on warfare in the future.
World War II (1939-1945)
* Territorial changes: The war resulted in even more significant territorial changes than World War I. Germany was again defeated and lost even more territory. The Soviet Union annexed a large amount of territory from Eastern Europe, and China emerged from the war as a major power.
* Political changes: The war led to the creation of the United Nations, an international organization designed to promote peace and prevent future wars. It also led to the creation of the state of Israel and the decolonization of Africa and Asia.
* Economic changes: The war caused enormous economic destruction, particularly in Europe. The United States again emerged from the war as the dominant economic power in the world.
* Social changes: The war had a deep impact on society, leading to increased social mobility, consumerism, and cultural exchange. It also led to the rise of modern civil rights movements, particularly in the United States.
* Technological changes: The war saw the development of new technologies, such as the atomic bomb, radar, and rocketry. These technologies would have a major impact on the future of warfare and society as a whole.
In conclusion, World Wars I and II had a profound and lasting impact on the world. These wars changed the political, economic, social, and technological landscape of the planet, and their effects are still felt today.