How did World War 1 change forms of government in Europe?

World War I significantly altered the political landscape in Europe, leading to the collapse of empires and the rise of new forms of government. The Austro-Hungarian, Ottoman, German, and Russian empires disintegrated, paving the way for republics and new nation-states. In Russia, the Bolshevik Revolution in 1917 resulted in the establishment of a communist government, which inspired similar movements across Europe. Additionally, the war fostered disillusionment with monarchies and authoritarian regimes, contributing to the rise of democratic ideals and political instability in the interwar period.