World War I had a profound influence on the rise of totalitarian regimes in Europe. The war caused widespread devastation, economic hardship, and political instability, creating fertile ground for radical ideologies such as fascism and communism. Countries like Germany and Italy faced economic crises and social unrest, leading to the emergence of authoritarian leaders like Adolf Hitler and Benito Mussolini, who promised national revival and stability. The Treaty of Versailles further exacerbated grievances, particularly in Germany, fostering resentment and extremism. The post-war environment contributed to a rejection of democratic ideals, facilitating the establishment of totalitarian regimes throughout Europe.