How did the unification change Europe?

The unification of various European nations, particularly through events like the unification of Germany and Italy in the 19th century, significantly altered the political landscape of Europe. It led to the emergence of stronger nation-states, shifting the balance of power and contributing to increased nationalism. This unification also stirred tensions among existing powers, setting the stage for conflicts like World War I. Additionally, it fostered economic cooperation and cultural exchanges that shaped modern European identity.