World War I, which lasted from 1914 to 1918, was one of the most defining events in world history, influencing many aspects of society’s social life. The social impact of this war was broad and profound, bringing about changes that would shape generations to come. First of all, World War I caused major changes in the demographic structure of society. Many countries experienced significant population loss due to the deaths of soldiers and civilians. In France, for example, it is estimated that more than 1.3 million people died, many of them young men. This has led to a striking gender imbalance, with many women having to take over traditional roles in the economy and daily life. This change in gender roles also marked the beginning of a stronger feminist movement. During the war, many women took jobs in arms factories and other fields previously dominated by men. This changed society’s perception of women’s capabilities and fueled the movement for voting rights and gender equality after the war ended. Women began to demand equal rights, and in many countries, employment opportunities for women increased significantly. Furthermore, the social impact of World War I was also seen in increased social mobilization. From the beginning of the war, the government began to withdraw resources from civil society. These actions established solidarity among communities, with many collaborating to support the war effort. However, as the war progressed, discontent began to emerge, accompanied by strikes and protests demanding better working conditions. After the war, poor economic conditions also triggered social conflict. Inflation is soaring in many countries, making life difficult for many people. The proletariat, already marginalized, felt the effects even harder, creating tensions between different social classes. This gave rise to new social and political movements such as communism and socialism. The war also accelerated the movement of nationalism in the colonies. Many colonized countries began to demand independence, fueled by unfulfilled hopes during and after the war. This sparked many liberation movements that would culminate in decades of long struggles for independence in various parts of the world. Cultural activities were also significantly affected by World War I. Literary, artistic and musical works were heavily influenced by the traumatic experiences of war. Many writers, artists, and intellectuals not only reflected on the experiences of the war, but also criticized the policies that led to the conflict. A wave of expressionism and dadaism emerged as an artistic response to the chaos caused by the war. The social impact of World War I was complex and involved changes in demographic structure, gender roles, social mobilization, class conflict, and nationalist movements. Through these various dimensions, World War I not only influenced the generations living at that time but also shaped the direction of history including social and cultural aspects during the following decades.